81128908 (number)

81128908 is an even 8-digits composite number following 81128907 and preceding 81128909. In scientific notation, it is written as 8.1128908 × 10^7. The sum of its digits is 37. It has a total of 5 prime factors and 18 positive divisors. There are 34769448 positive integers (up to 81128908) that are relatively prime to 81128908.

Interesting facts

Basic properties

Name

Name eighty-one million one hundred twenty-eight thousand nine hundred eight

Notation

Scientific notation 8.1128908 × 10^7
Engineering notation 8.1128908 × 10^6

Prime Factorization of 81128908

Prime Factorization 2 × 2 × 7 × 7 × 413923

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 5794922
Product of the distinct prime numbers

The prime factorization of 81128908 is 2 × 2 × 7 × 7 × 413923. Since it has a total of 5 prime factors.

Most popular turbo-numbers

10, 5, 41, 78, 30, 262, 7975, 7437, 87054, 67558, 624181, 206999, 7964722, 9504745, 73877713, 1435923, 178618036, 444654871, 4331678435, 7348621533

Basic calculations (n = 81128908)

Multiplication

n×y
n×2 162257816
n×3 243386724
n×4 324515632
n×5 405644540

Division

n÷y
n÷2 40564454
n÷3 27042969.333333
n÷3 20282227
n÷5 16225781.6

Exponentiation

ny
n2 6581899713272464
n3 5.3398233630331E+23
n4 4.3321403835576E+31
n5 3.5146181862073E+39

Nth Root

y√n
2√n 9007.158708494
3√n 432.90427722575
4√n 94.906052011945
5√n 38.179929847472

Divisors of 81128908

1, 2, 4, 7, 14, 28, 49, 98, 196, 413923, 827846, 1655692, 2897461, 5794922, 11589844, 20282227, 40564454, 81128908

18 divisors

τ Total Divisors 18
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81128907
Sum of the proper positive divisors of n
A Arithmetic Mean 0.055555555555556
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 18
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81128908 can be divided by 18 positive divisors. The sum of these divisors (counting 81128908) is 1, the average is 0.055555555555556.

Base conversion 81128908

Base System Value
2 Binary 100110101011110110111001100
3 Ternary 12122122202221101
4 Quaternary 10311132313030
5 Quinary 131232111113
6 Senary 12014512444
8 Octal 465366714
10 Decimal 81128908
12 Duodecimal 23205724
16 Hexadecimal 4d5edcc
20 Vigesimal 1571258
36 Base36 1cavgs

Cryptographic Hash Functions

md5 d1b7cd705256b0b90165615ac296e772
sha1 84b6cbad41ca50a631fe1aa2379b71ec2824c86d
sha256 7a69919a2c425f9380e7742982441ec76b3a7613b4e482071a11e012bfa8eef4
sha512 655a77a8d95ace2179fe5886e3ed6cb4339a92c1d76e00bc1c404b9a916f497b1717848b62a6958c95f5bef8deea853483b74d16ec1f24618e13601d2578f4ee
ripemd-160 77ca95503df34277ae735d5b8b2a83debe80cbef

81128908 as geometric shapes

Circle

Radius = n
Diameter 162257816
Circumference 509747962.73312
Area 2.0677647785882E+16

Sphere

Radius = n
Volume 2.2367399798362E+24
Surface area 8.2710591143526E+16
Circumference 509747962.73312

Square

Length = n
Perimeter 324515632
Area 6581899713272464
Diagonal 114733601.99412

Cube

Length = n
Surface area 39491398279634784
Volume 5.3398233630331E+23
Space diagonal 140519390.61858

Equilateral Triangle

Length = n
Perimeter 243386724
Area 2.8500461784277E+15
Altitude 70259695.309291

Triangular Pyramid

Length = n
Surface area 2.8500461784277E+15
Volume 6.2930421838984E+22
Height 38244533.99804