81288405 (number)

81288405 is an odd 8-digits composite number following 81288404 and preceding 81288406. In scientific notation, it is written as 8.1288405 × 10^7. The sum of its digits is 36. It has a total of 5 prime factors and 28 positive divisors. There are 39409920 positive integers (up to 81288405) that are relatively prime to 81288405.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eighty-eight thousand four hundred five

Notation

Scientific notation 8.1288405 × 10^7
Engineering notation 8.1288405 × 10^6

Prime Factorization of 81288405

Prime Factorization 5 × 3 × 11 × 33 × 14929

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81288405
Product of the distinct prime numbers

The prime factorization of 81288405 is 5 × 3 × 11 × 33 × 14929. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 7, 21, 38, 524, 920, 1547, 7834, 95359, 36322, 240128, 242614, 8173708, 2461013, 36805410, 42391083, 945361364, 528677357, 6936922271, 641127065

Basic calculations (n = 81288405)

Multiplication

n×y
n×2 162576810
n×3 243865215
n×4 325153620
n×5 406442025

Division

n÷y
n÷2 40644202.5
n÷3 27096135
n÷3 20322101.25
n÷5 16257681

Exponentiation

ny
n2 6607804787444025
n3 5.3713791172269E+23
n4 4.3663084108968E+31
n5 3.5493024645989E+39

Nth Root

y√n
2√n 9016.0082630841
3√n 433.18778379365
4√n 94.952663275361
5√n 38.194930175433

Divisors of 81288405

1, 3, 5, 11, 15, 33, 55, 99, 165, 363, 495, 1089, 1815, 5445, 14929, 44787, 74645, 164219, 223935, 492657, 821095, 1477971, 2463285, 5419227, 7389855, 16257681, 27096135, 81288405

28 divisors

τ Total Divisors 28
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81288404
Sum of the proper positive divisors of n
A Arithmetic Mean 0.035714285714286
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 28
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81288405 can be divided by 28 positive divisors. The sum of these divisors (counting 81288405) is 1, the average is 0.035714285714286.

Base conversion 81288405

Base System Value
2 Binary 100110110000101110011010101
3 Ternary 12122221212201200
4 Quaternary 10312011303111
5 Quinary 131302212110
6 Senary 12022143113
8 Octal 466056325
10 Decimal 81288405
12 Duodecimal 23281a99
16 Hexadecimal 4d85cd5
20 Vigesimal 1581105
36 Base36 1ceaj9

Cryptographic Hash Functions

md5 bfb860fe997066c0e955eabf455209fd
sha1 cc35959b0538669997f97a64fe9ddd75c7219c6d
sha256 ea95350e88a77faee421eee324e45fcea04b62d3fa63dfce195a184bba6ac8d9
sha512 eabc6812f1f26f42f5a4bf46fe1df5628a5b3f981f81b18e2824d7950e1ee6537d0c65b965d14e6baa8d90077db15f3e841e6a978b1fac43352fbe2247a46068
ripemd-160 876e59d8c024802923f9ee2324c2f4218f241d91

81288405 as geometric shapes

Circle

Radius = n
Diameter 162576810
Circumference 510750111.94006
Area 2.075903097659E+16

Sphere

Radius = n
Volume 2.2499580232434E+24
Surface area 8.3036123906358E+16
Circumference 510750111.94006

Square

Length = n
Perimeter 325153620
Area 6607804787444025
Diagonal 114959164.81468

Cube

Length = n
Surface area 39646828724664150
Volume 5.3713791172269E+23
Space diagonal 140795647.52624

Equilateral Triangle

Length = n
Perimeter 243865215
Area 2.8612634045875E+15
Altitude 70397823.763118

Triangular Pyramid

Length = n
Surface area 2.8612634045875E+15
Volume 6.3302309968582E+22
Height 38319721.604892