81361280 (number)

81361280 is an even 8-digits composite number following 81361279 and preceding 81361281. In scientific notation, it is written as 8.1361280 × 10^7. The sum of its digits is 29. It has a total of 12 prime factors and 256 positive divisors. There are 23224320 positive integers (up to 81361280) that are relatively prime to 81361280.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred sixty-one thousand two hundred eighty

Notation

Scientific notation 8.1361280 × 10^7
Engineering notation 8.1361280 × 10^6

Prime Factorization of 81361280

Prime Factorization 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 11 × 13 × 7 × 127

Composite number
ω Distinct Factors 6
Total number of distinct prime factors
Ω Total Factors 12
Total number of prime factors
rad Radical 1271270
Product of the distinct prime numbers

The prime factorization of 81361280 is 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 11 × 13 × 7 × 127. Since it has a total of 12 prime factors.

Most popular turbo-numbers

3, 7, 12, 46, 460, 939, 811, 6937, 30348, 48117, 977910, 764875, 6819905, 1346723, 18447595, 75485410, 310001872, 947574774, 8184451870, 7408707340

Basic calculations (n = 81361280)

Multiplication

n×y
n×2 162722560
n×3 244083840
n×4 325445120
n×5 406806400

Division

n÷y
n÷2 40680640
n÷3 27120426.666667
n÷3 20340320
n÷5 16272256

Exponentiation

ny
n2 6619657883238400
n3 5.3858383854237E+23
n4 4.381987049112E+31
n5 3.5652407525918E+39

Nth Root

y√n
2√n 9020.0487803559
3√n 433.31719598025
4√n 94.973937374187
5√n 38.201776066743

Divisors of 81361280

1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 26, 28, 32, 35, 40, 44, 52, 55, 56, 64, 65, 70, 77, 80, 88, 91, 104, 110, 112, 127, 128, 130, 140, 143, 154, 160, 176, 182, 208, 220, 224, 254, 260, 280, 286, 308, 320, 352, 364, 385, 416, 440, 448, 455, 508, 520, 560, 572, 616, 635, 640, 704, 715, 728, 770, 832, 880, 889, 896, 910, 1001, 1016, 1040, 1120, 1144, 1232, 1270, 1397, 1408, 1430, 1456, 1540, 1651, 1664, 1760, 1778, 1820, 2002, 2032, 2080, 2240, 2288, 2464, 2540, 2794, 2860, 2912, 3080, 3302, 3520, 3556, 3640, 4004, 4064, 4160, 4445, 4480, 4576, 4928, 5005, 5080, 5588, 5720, 5824, 6160, 6604, 6985, 7040, 7112, 7280, 8008, 8128, 8255, 8320, 8890, 9152, 9779, 9856, 10010, 10160, 11176, 11440, 11557, 11648, 12320, 13208, 13970, 14224, 14560, 16016, 16256, 16510, 17780, 18161, 18304, 19558, 20020, 20320, 22352, 22880, 23114, 24640, 26416, 27940, 28448, 29120, 32032, 33020, 35560, 36322, 39116, 40040, 40640, 44704, 45760, 46228, 48895, 49280, 52832, 55880, 56896, 57785, 58240, 64064, 66040, 71120, 72644, 78232, 80080, 81280, 89408, 90805, 91520, 92456, 97790, 105664, 111760, 113792, 115570, 127127, 128128, 132080, 142240, 145288, 156464, 160160, 178816, 181610, 184912, 195580, 211328, 223520, 231140, 254254, 264160, 284480, 290576, 312928, 320320, 363220, 369824, 391160, 447040, 462280, 508508, 528320, 568960, 581152, 625856, 635635, 640640, 726440, 739648, 782320, 894080, 924560, 1017016, 1056640, 1162304, 1251712, 1271270, 1452880, 1479296, 1564640, 1849120, 2034032, 2324608, 2542540, 2905760, 3129280, 3698240, 4068064, 5085080, 5811520, 6258560, 7396480, 8136128, 10170160, 11623040, 16272256, 20340320, 40680640, 81361280

256 divisors

τ Total Divisors 256
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81361279
Sum of the proper positive divisors of n
A Arithmetic Mean 0.00390625
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 256
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81361280 can be divided by 256 positive divisors. The sum of these divisors (counting 81361280) is 1, the average is 0.00390625.

Base conversion 81361280

Base System Value
2 Binary 100110110010111100110000000
3 Ternary 12200002120200202
4 Quaternary 10312113212000
5 Quinary 131312030110
6 Senary 12023504332
8 Octal 466274600
10 Decimal 81361280
12 Duodecimal 232b80a8
16 Hexadecimal 4d97980
20 Vigesimal 158a340
36 Base36 1cfurk

Cryptographic Hash Functions

md5 c6fb8bcefa2f7b0fa59ea2e3642b5f38
sha1 359a746720e8e4c7dc21c1164fdbd56ed4042acb
sha256 894ca5098270cca3e87d7c6144e12fc858addeae8c5bc28bd69e477c5613fa4b
sha512 dc9233cb91d18f51711c3258c7b474481d7a9ac410d05bf150ca3758a6d55d4645231d2bf850fffb71826417c41a4c5a64419cbc621162713dc6d33035627971
ripemd-160 1e5ea62754e60630c6a2aedd5b0e8264b43cf3f4

81361280 as geometric shapes

Circle

Radius = n
Diameter 162722560
Circumference 511207999.06932
Area 2.079626857526E+16

Sphere

Radius = n
Volume 2.2560147073425E+24
Surface area 8.3185074301038E+16
Circumference 511207999.06932

Square

Length = n
Perimeter 325445120
Area 6619657883238400
Diagonal 115062225.62803

Cube

Length = n
Surface area 39717947299430400
Volume 5.3858383854237E+23
Space diagonal 140921870.72884

Equilateral Triangle

Length = n
Perimeter 244083840
Area 2.8663959456232E+15
Altitude 70460935.364419

Triangular Pyramid

Length = n
Surface area 2.8663959456232E+15
Volume 6.3472714078465E+22
Height 38354075.209345