81128380 (number)

81128380 is an even 8-digits composite number following 81128379 and preceding 81128381. In scientific notation, it is written as 8.1128380 × 10^7. The sum of its digits is 31. It has a total of 4 prime factors and 12 positive divisors. There are 32451344 positive integers (up to 81128380) that are relatively prime to 81128380.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1128380 × 10^7
Engineering notation 8.1128380 × 10^6

Prime Factorization of 81128380

Prime Factorization 2 × 2 × 5 × 4056419

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40564190
Product of the distinct prime numbers

The prime factorization of 81128380 is 2 × 2 × 5 × 4056419. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 3, 65, 43, 53, 599, 4026, 5239, 90247, 15691, 303103, 937514, 5529212, 311167, 89460180, 33909401, 542973029, 167071823, 7723696780, 9321411947

Basic calculations (n = 81128380)

Multiplication

n×y
n×2 162256760
n×3 243385140
n×4 324513520
n×5 405641900

Division

n÷y
n÷2 40564190
n÷3 27042793.333333
n÷3 20282095
n÷5 16225676

Exponentiation

ny
n2 6581814041424400
n3 5.3397191064201E+23
n4 4.3320276075891E+31
n5 3.5145038191898E+39

Nth Root

y√n
2√n 9007.1293984266
3√n 432.90333808679
4√n 94.9058975956
5√n 38.179880151116

Divisors of 81128380

1, 2, 4, 5, 10, 20, 4056419, 8112838, 16225676, 20282095, 40564190, 81128380

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 -81128379
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 81128380 can be divided by 12 positive divisors. The sum of these divisors (counting 81128380) is 1, the average is 0.083333333333333.

Base conversion 81128380

Base System Value
2 Binary 100110101011110101110111100
3 Ternary 12122122202012211
4 Quaternary 10311132232330
5 Quinary 131232102010
6 Senary 12014510204
8 Octal 465365674
10 Decimal 81128380
12 Duodecimal 23205364
16 Hexadecimal 4d5ebbc
20 Vigesimal 15710j0
36 Base36 1cav24

Cryptographic Hash Functions

md5 391d179820cc3e8c4e24633fcfd8991a
sha1 50e3226c9ec13311dbeedff2c7bd6569b80bf31e
sha256 d4bd8af000a91239d2ce9025343ae55df5f279f025eb00707bbe935e1271355d
sha512 312f137cae0b94f5f1003c56557c40695da96bc2c377a9ef23e0405577fde460bbd3841e94cf4877381b0f8b10e592e4da6e791205de62d86e64c5bf239478d5
ripemd-160 3f9bf4959b22ed8c15e26bd703c601037f51a745

81128380 as geometric shapes

Circle

Radius = n
Diameter 162256760
Circumference 509744645.21128
Area 2.0677378639833E+16

Sphere

Radius = n
Volume 2.2366963089283E+24
Surface area 8.2709514559332E+16
Circumference 509744645.21128

Square

Length = n
Perimeter 324513520
Area 6581814041424400
Diagonal 114732855.28936

Cube

Length = n
Surface area 39490884248546400
Volume 5.3397191064201E+23
Space diagonal 140518476.09575

Equilateral Triangle

Length = n
Perimeter 243385140
Area 2.8500090814293E+15
Altitude 70259238.047877

Triangular Pyramid

Length = n
Surface area 2.8500090814293E+15
Volume 6.2929193163018E+22
Height 38244285.096453