81285672 (number)

81285672 is an even 8-digits composite number following 81285671 and preceding 81285673. In scientific notation, it is written as 8.1285672 × 10^7. The sum of its digits is 39. It has a total of 7 prime factors and 64 positive divisors. There are 24595200 positive integers (up to 81285672) that are relatively prime to 81285672.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eighty-five thousand six hundred seventy-two

Notation

Scientific notation 8.1285672 × 10^7
Engineering notation 8.1285672 × 10^6

Prime Factorization of 81285672

Prime Factorization 2 × 2 × 2 × 3 × 13 × 61 × 4271

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20321418
Product of the distinct prime numbers

The prime factorization of 81285672 is 2 × 2 × 2 × 3 × 13 × 61 × 4271. Since it has a total of 7 prime factors.

Most popular turbo-numbers

1, 3, 64, 35, 319, 916, 2637, 439, 48955, 94467, 589217, 382119, 5001884, 2455686, 53666296, 51384848, 76405715, 148926781, 7151284536, 754173317

Basic calculations (n = 81285672)

Multiplication

n×y
n×2 162571344
n×3 243857016
n×4 325142688
n×5 406428360

Division

n÷y
n÷2 40642836
n÷3 27095224
n÷3 20321418
n÷5 16257134.4

Exponentiation

ny
n2 6607360472491584
n3 5.3708373615272E+23
n4 4.3657212413444E+31
n5 3.5487058486736E+39

Nth Root

y√n
2√n 9015.8566980626
3√n 433.18292899924
4√n 94.951865163685
5√n 38.194673341391

Divisors of 81285672

1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 61, 78, 104, 122, 156, 183, 244, 312, 366, 488, 732, 793, 1464, 1586, 2379, 3172, 4271, 4758, 6344, 8542, 9516, 12813, 17084, 19032, 25626, 34168, 51252, 55523, 102504, 111046, 166569, 222092, 260531, 333138, 444184, 521062, 666276, 781593, 1042124, 1332552, 1563186, 2084248, 3126372, 3386903, 6252744, 6773806, 10160709, 13547612, 20321418, 27095224, 40642836, 81285672

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81285671
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81285672 can be divided by 64 positive divisors. The sum of these divisors (counting 81285672) is 1, the average is 0.015625.

Base conversion 81285672

Base System Value
2 Binary 100110110000101001000101000
3 Ternary 12122221201222110
4 Quaternary 10312011020220
5 Quinary 131302120142
6 Senary 12022122320
8 Octal 466051050
10 Decimal 81285672
12 Duodecimal 232803a0
16 Hexadecimal 4d85228
20 Vigesimal 1580e3c
36 Base36 1ce8fc

Cryptographic Hash Functions

md5 5c55bc6d68383e88f9fbadf265ba1062
sha1 bd5f8a1b4e5ffe93487df615ccb432e424341530
sha256 e2d2a0bd6f60de94ed8037d15fdfbf69d91e457630587eaba0567efaeb7fddae
sha512 a05812f22cb1d95af294dfdb2287742f273254b170b19b272eaa160449fd7de394b2098a065048d8fd01eb5a1e4c7c3f8c4be38be6e03be4dcdcd008303045c6
ripemd-160 37aab2a841c024f2c3eb1f98a0d4730dd119b333

81285672 as geometric shapes

Circle

Radius = n
Diameter 162571344
Circumference 510732939.99462
Area 2.0757635119999E+16

Sphere

Radius = n
Volume 2.2497310931466E+24
Surface area 8.3030540479997E+16
Circumference 510732939.99462

Square

Length = n
Perimeter 325142688
Area 6607360472491584
Diagonal 114955299.76901

Cube

Length = n
Surface area 39644162834949504
Volume 5.3708373615272E+23
Space diagonal 140790913.83138

Equilateral Triangle

Length = n
Perimeter 243857016
Area 2.8610710105694E+15
Altitude 70395456.915689

Triangular Pyramid

Length = n
Surface area 2.8610710105694E+15
Volume 6.3295925316432E+22
Height 38318433.256337