81288440 (number)

81288440 is an even 8-digits composite number following 81288439 and preceding 81288441. In scientific notation, it is written as 8.1288440 × 10^7. The sum of its digits is 35. It has a total of 7 prime factors and 64 positive divisors. There are 30840832 positive integers (up to 81288440) that are relatively prime to 81288440.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1288440 × 10^7
Engineering notation 8.1288440 × 10^6

Prime Factorization of 81288440

Prime Factorization 2 × 2 × 2 × 5 × 23 × 149 × 593

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20322110
Product of the distinct prime numbers

The prime factorization of 81288440 is 2 × 2 × 2 × 5 × 23 × 149 × 593. Since it has a total of 7 prime factors.

Most popular turbo-numbers

6, 8, 55, 36, 604, 560, 5380, 2255, 52054, 35553, 782269, 26922, 2721551, 2802566, 99367331, 24880327, 261944679, 639204249, 8384679016, 4486213989

Basic calculations (n = 81288440)

Multiplication

n×y
n×2 162576880
n×3 243865320
n×4 325153760
n×5 406442200

Division

n÷y
n÷2 40644220
n÷3 27096146.666667
n÷3 20322110
n÷5 16257688

Exponentiation

ny
n2 6607810477633600
n3 5.3713860554249E+23
n4 4.3663159308324E+31
n5 3.5493101056452E+39

Nth Root

y√n
2√n 9016.0102040759
3√n 433.18784596557
4√n 94.952673496199
5√n 38.194933464518

Divisors of 81288440

1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 149, 184, 230, 298, 460, 593, 596, 745, 920, 1186, 1192, 1490, 2372, 2965, 2980, 3427, 4744, 5930, 5960, 6854, 11860, 13639, 13708, 17135, 23720, 27278, 27416, 34270, 54556, 68195, 68540, 88357, 109112, 136390, 137080, 176714, 272780, 353428, 441785, 545560, 706856, 883570, 1767140, 2032211, 3534280, 4064422, 8128844, 10161055, 16257688, 20322110, 40644220, 81288440

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81288439
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81288440 can be divided by 64 positive divisors. The sum of these divisors (counting 81288440) is 1, the average is 0.015625.

Base conversion 81288440

Base System Value
2 Binary 100110110000101110011111000
3 Ternary 12122221212202222
4 Quaternary 10312011303320
5 Quinary 131302212230
6 Senary 12022143212
8 Octal 466056370
10 Decimal 81288440
12 Duodecimal 23281b08
16 Hexadecimal 4d85cf8
20 Vigesimal 1581120
36 Base36 1ceak8

Cryptographic Hash Functions

md5 d11a235bac2267829b2238a7ae93164e
sha1 c47be04963b30c9007c709ab54288e27403665d8
sha256 3adb81f5d4946d8a0969e8eddaaa226a65889b4f462598e82aa6375c470f591f
sha512 9630983fdcaae25dcd48e21273ed9f4b52bb69758e81b04322ccae4e9290baac2e95ed383e3e2c3e212ddca39bd36bbc6aaa476e04f89968fc84e8c755b13f87
ripemd-160 a498fc7ffca5ce2edaf01b0c821ad36ceb0b917d

81288440 as geometric shapes

Circle

Radius = n
Diameter 162576880
Circumference 510750331.85155
Area 2.0759048852847E+16

Sphere

Radius = n
Volume 2.249960929509E+24
Surface area 8.303619541139E+16
Circumference 510750331.85155

Square

Length = n
Perimeter 325153760
Area 6607810477633600
Diagonal 114959214.31215

Cube

Length = n
Surface area 39646862865801600
Volume 5.3713860554249E+23
Space diagonal 140795708.14801

Equilateral Triangle

Length = n
Perimeter 243865320
Area 2.8612658685118E+15
Altitude 70397854.074007

Triangular Pyramid

Length = n
Surface area 2.8612658685118E+15
Volume 6.330239173603E+22
Height 38319738.104051