81397908 (number)

81397908 is an even 8-digits composite number following 81397907 and preceding 81397909. In scientific notation, it is written as 8.1397908 × 10^7. The sum of its digits is 45. It has a total of 4 prime factors and 12 positive divisors. There are 27132624 positive integers (up to 81397908) that are relatively prime to 81397908.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred ninety-seven thousand nine hundred eight

Notation

Scientific notation 8.1397908 × 10^7
Engineering notation 8.1397908 × 10^6

Prime Factorization of 81397908

Prime Factorization 2 × 2 × 9 × 2261053

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40698954
Product of the distinct prime numbers

The prime factorization of 81397908 is 2 × 2 × 9 × 2261053. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 7, 30, 26, 823, 130, 1657, 2634, 50021, 76168, 521787, 408769, 4258495, 4041612, 14394151, 31696170, 211586830, 635995648, 3189927418, 9604010297

Basic calculations (n = 81397908)

Multiplication

n×y
n×2 162795816
n×3 244193724
n×4 325591632
n×5 406989540

Division

n÷y
n÷2 40698954
n÷3 27132636
n÷3 20349477
n÷5 16279581.6

Exponentiation

ny
n2 6625619426776464
n3 5.3931156054376E+23
n4 4.3898832788478E+31
n5 3.5732731526239E+39

Nth Root

y√n
2√n 9022.0789178548
3√n 433.38221118615
4√n 94.984624639227
5√n 38.20521505578

Divisors of 81397908

1, 2, 4, 9, 18, 36, 2261053, 4522106, 9044212, 20349477, 40698954, 81397908

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81397907
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81397908 can be divided by 12 positive divisors. The sum of these divisors (counting 81397908) is 1, the average is 0.083333333333333.

Base conversion 81397908

Base System Value
2 Binary 100110110100000100010010100
3 Ternary 12200011102221100
4 Quaternary 10312200202110
5 Quinary 131314213113
6 Senary 12024350100
8 Octal 466404224
10 Decimal 81397908
12 Duodecimal 23315330
16 Hexadecimal 4da0894
20 Vigesimal 158eef8
36 Base36 1cgn10

Cryptographic Hash Functions

md5 b5a31aeca8bf66b815150b71ff500d2a
sha1 a4154ec8aa04a8e73ef6ce61ee449cb126d46f34
sha256 dbc6cc790b52efc0b92c1b27fd787b1fbe1f30cdd570ae440a7d8ab69fc44cfa
sha512 df18d6de879c15879600c388c270a2608ad6f93215ab93a70bc1d33aaa45d78770ad6e0333538c05efc9327ed27fc5587ea1d3bb41207c72865db5a906ba1e4e
ripemd-160 999cd526cc659ea49a85fc115852d9a0557dfc2a

81397908 as geometric shapes

Circle

Radius = n
Diameter 162795816
Circumference 511438139.58076
Area 2.0814997316643E+16

Sphere

Radius = n
Volume 2.2590629821338E+24
Surface area 8.3259989266571E+16
Circumference 511438139.58076

Square

Length = n
Perimeter 325591632
Area 6625619426776464
Diagonal 115114025.4424

Cube

Length = n
Surface area 39753716560658784
Volume 5.3931156054376E+23
Space diagonal 140985312.28582

Equilateral Triangle

Length = n
Perimeter 244193724
Area 2.8689773696981E+15
Altitude 70492656.142909

Triangular Pyramid

Length = n
Surface area 2.8689773696981E+15
Volume 6.3558476938799E+22
Height 38371341.814132