81121640 (number)

81121640 is an even 8-digits composite number following 81121639 and preceding 81121641. In scientific notation, it is written as 8.1121640 × 10^7. The sum of its digits is 23. It has a total of 6 prime factors and 32 positive divisors. There are 30740544 positive integers (up to 81121640) that are relatively prime to 81121640.

Interesting facts

Basic properties

Name

Name eighty-one million one hundred twenty-one thousand six hundred forty

Notation

Scientific notation 8.1121640 × 10^7
Engineering notation 8.1121640 × 10^6

Prime Factorization of 81121640

Prime Factorization 2 × 2 × 2 × 19 × 5 × 106739

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 20280410
Product of the distinct prime numbers

The prime factorization of 81121640 is 2 × 2 × 2 × 19 × 5 × 106739. Since it has a total of 6 prime factors.

Most popular turbo-numbers

5, 7, 24, 44, 226, 441, 4216, 8649, 96409, 89841, 530424, 772095, 1773575, 3073165, 50260474, 43808553, 938286537, 7059042, 7289923459, 1199722910

Basic calculations (n = 81121640)

Multiplication

n×y
n×2 162243280
n×3 243364920
n×4 324486560
n×5 405608200

Division

n÷y
n÷2 40560820
n÷3 27040546.666667
n÷3 20280410
n÷5 16224328

Exponentiation

ny
n2 6580720476289600
n3 5.3383883741819E+23
n4 4.3305881987057E+31
n5 3.5130441684365E+39

Nth Root

y√n
2√n 9006.7552425943
3√n 432.89134947769
4√n 94.903926381337
5√n 38.179245746869

Divisors of 81121640

1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 106739, 213478, 426956, 533695, 853912, 1067390, 2028041, 2134780, 4056082, 4269560, 8112164, 10140205, 16224328, 20280410, 40560820, 81121640

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81121639
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81121640 can be divided by 32 positive divisors. The sum of these divisors (counting 81121640) is 1, the average is 0.03125.

Base conversion 81121640

Base System Value
2 Binary 100110101011101000101101000
3 Ternary 12122122101222012
4 Quaternary 10311131011220
5 Quinary 131231343030
6 Senary 12014415052
8 Octal 465350550
10 Decimal 81121640
12 Duodecimal 23201488
16 Hexadecimal 4d5d168
20 Vigesimal 1570420
36 Base36 1capuw

Cryptographic Hash Functions

md5 c0b7d83910bbeff7dcd476ef2dd911aa
sha1 0a7af1ee4de89ed0b6592c6db654b4b6ab8aa42e
sha256 4975a69cf6e916aa5755ff875c7f60d92ed8798f2adb9ce7bbf5393c2c2a862f
sha512 aa9a017a4613e8bd405cfea42786bf4f1bb791a2aa051b9b6c7d8ec28a655402eb39e3c3ed98836a5e964eaa8da2a75ac0c05288f2913171dae122578414380d
ripemd-160 4850e59769eb08a57e97ea365e4b013538ad9657

81121640 as geometric shapes

Circle

Radius = n
Diameter 162243280
Circumference 509702296.54231
Area 2.0673943103639E+16

Sphere

Radius = n
Volume 2.2361388931119E+24
Surface area 8.2695772414557E+16
Circumference 509702296.54231

Square

Length = n
Perimeter 324486560
Area 6580720476289600
Diagonal 114723323.48995

Cube

Length = n
Surface area 39484322857737600
Volume 5.3383883741819E+23
Space diagonal 140506802.07331

Equilateral Triangle

Length = n
Perimeter 243364920
Area 2.8495355538356E+15
Altitude 70253401.036656

Triangular Pyramid

Length = n
Surface area 2.8495355538356E+15
Volume 6.2913510333191E+22
Height 38241107.829983