81397904 (number)

81397904 is an even 8-digits composite number following 81397903 and preceding 81397905. In scientific notation, it is written as 8.1397904 × 10^7. The sum of its digits is 41. It has a total of 6 prime factors and 20 positive divisors. There are 32832000 positive integers (up to 81397904) that are relatively prime to 81397904.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1397904 × 10^7
Engineering notation 8.1397904 × 10^6

Prime Factorization of 81397904

Prime Factorization 2 × 2 × 2 × 2 × 119 × 42751

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10174738
Product of the distinct prime numbers

The prime factorization of 81397904 is 2 × 2 × 2 × 2 × 119 × 42751. Since it has a total of 6 prime factors.

Most popular turbo-numbers

10, 6, 11, 94, 717, 878, 1381, 2238, 93578, 96032, 585377, 957360, 6603608, 1200756, 29802875, 30972986, 342022278, 20521183, 1911870723, 8294658445

Basic calculations (n = 81397904)

Multiplication

n×y
n×2 162795808
n×3 244193712
n×4 325591616
n×5 406989520

Division

n÷y
n÷2 40698952
n÷3 27132634.666667
n÷3 20349476
n÷5 16279580.8

Exponentiation

ny
n2 6625618775593216
n3 5.3931148103633E+23
n4 4.3898824159493E+31
n5 3.5732722746473E+39

Nth Root

y√n
2√n 9022.0786961764
3√n 433.38220408716
4√n 94.984623472309
5√n 38.205214680289

Divisors of 81397904

1, 2, 4, 8, 16, 119, 238, 476, 952, 1904, 42751, 85502, 171004, 342008, 684016, 5087369, 10174738, 20349476, 40698952, 81397904

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81397903
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81397904 can be divided by 20 positive divisors. The sum of these divisors (counting 81397904) is 1, the average is 0.05.

Base conversion 81397904

Base System Value
2 Binary 100110110100000100010010000
3 Ternary 12200011102221012
4 Quaternary 10312200202100
5 Quinary 131314213104
6 Senary 12024350052
8 Octal 466404220
10 Decimal 81397904
12 Duodecimal 23315328
16 Hexadecimal 4da0890
20 Vigesimal 158eef4
36 Base36 1cgn0w

Cryptographic Hash Functions

md5 95272a26b127a01178319eb9bfd457b1
sha1 d39a2a9c5a5193c37dce75de2057b7aafc6487b0
sha256 42f021806e36508954131eafa865db4f7b84e3ab8ce16086c78ab954d10201fa
sha512 12ac2fa03dc1029409c9ea0f019e84f27b2fd6b12ca73922fd3b53da1cde263784908adb67bb9d1df5f17870c2e99740b98f659d18f007457101585458e0a6b2
ripemd-160 08458ef62a7f05829121ee13f5ae13b22742ef1f

81397904 as geometric shapes

Circle

Radius = n
Diameter 162795808
Circumference 511438114.44801
Area 2.081499527089E+16

Sphere

Radius = n
Volume 2.2590626490938E+24
Surface area 8.3259981083561E+16
Circumference 511438114.44801

Square

Length = n
Perimeter 325591616
Area 6625618775593216
Diagonal 115114019.78554

Cube

Length = n
Surface area 39753712653559296
Volume 5.3931148103633E+23
Space diagonal 140985305.35761

Equilateral Triangle

Length = n
Perimeter 244193712
Area 2.8689770877274E+15
Altitude 70492652.678807

Triangular Pyramid

Length = n
Surface area 2.8689770877274E+15
Volume 6.3558467568759E+22
Height 38371339.928514