81508720 (number)

81508720 is an even 8-digits composite number following 81508719 and preceding 81508721. In scientific notation, it is written as 8.1508720 × 10^7. The sum of its digits is 31. It has a total of 6 prime factors and 20 positive divisors. There are 32603456 positive integers (up to 81508720) that are relatively prime to 81508720.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred eight thousand seven hundred twenty

Notation

Scientific notation 8.1508720 × 10^7
Engineering notation 8.1508720 × 10^6

Prime Factorization of 81508720

Prime Factorization 2 × 2 × 2 × 2 × 5 × 1018859

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10188590
Product of the distinct prime numbers

The prime factorization of 81508720 is 2 × 2 × 2 × 2 × 5 × 1018859. Since it has a total of 6 prime factors.

Most popular turbo-numbers

2, 9, 83, 89, 65, 280, 5221, 2997, 19718, 58891, 234703, 610451, 4109728, 9880647, 72678080, 13169670, 37490631, 344128413, 1615196034, 4247988752

Basic calculations (n = 81508720)

Multiplication

n×y
n×2 163017440
n×3 244526160
n×4 326034880
n×5 407543600

Division

n÷y
n÷2 40754360
n÷3 27169573.333333
n÷3 20377180
n÷5 16301744

Exponentiation

ny
n2 6643671436038400
n3 5.4151715485205E+23
n4 4.4138370150033E+31
n5 3.5976620538154E+39

Nth Root

y√n
2√n 9028.2179858486
3√n 433.57878533479
4√n 95.016935258135
5√n 38.215611619754

Divisors of 81508720

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018859, 2037718, 4075436, 5094295, 8150872, 10188590, 16301744, 20377180, 40754360, 81508720

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 -81508719
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 81508720 can be divided by 20 positive divisors. The sum of these divisors (counting 81508720) is 1, the average is 0.05.

Base conversion 81508720

Base System Value
2 Binary 100110110111011100101110000
3 Ternary 12200101001221111
4 Quaternary 10312323211300
5 Quinary 131331234340
6 Senary 12031003104
8 Octal 466734560
10 Decimal 81508720
12 Duodecimal 23369494
16 Hexadecimal 4dbb970
20 Vigesimal 1598bg0
36 Base36 1cj0j4

Cryptographic Hash Functions

md5 9e922bcec535e4a541c3e4c3575d5c9b
sha1 9cc98b45ab605ce9e398bfc1796b1b00366aaf5c
sha256 bab462aa1f892b2f626b273ca4463e7d79b975efa560ecc54fcfdb9337d2ab7f
sha512 04eb32bfd4a865e5e279ea26d594272812ad5845d9f4f9e0a96ed44529489e5fb8411572826cceb5cd5f97cc04a21752814ed927d59e6fea66846ee3833e2cfa
ripemd-160 6541e3147efed8ed81c205b19784fc6464e3daec

81508720 as geometric shapes

Circle

Radius = n
Diameter 163017440
Circumference 512134391.91101
Area 2.0871709376323E+16

Sphere

Radius = n
Volume 2.2683017539681E+24
Surface area 8.348683750529E+16
Circumference 512134391.91101

Square

Length = n
Perimeter 326034880
Area 6643671436038400
Diagonal 115270737.27567

Cube

Length = n
Surface area 39862028616230400
Volume 5.4151715485205E+23
Space diagonal 141177244.29991

Equilateral Triangle

Length = n
Perimeter 244526160
Area 2.8767941190031E+15
Altitude 70588622.149953

Triangular Pyramid

Length = n
Surface area 2.8767941190031E+15
Volume 6.3818408720789E+22
Height 38423579.09189