81289968 (number)

81289968 is an even 8-digits composite number following 81289967 and preceding 81289969. In scientific notation, it is written as 8.1289968 × 10^7. The sum of its digits is 51. It has a total of 6 prime factors and 20 positive divisors. There are 27096640 positive integers (up to 81289968) that are relatively prime to 81289968.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eighty-nine thousand nine hundred sixty-eight

Notation

Scientific notation 8.1289968 × 10^7
Engineering notation 8.1289968 × 10^6

Prime Factorization of 81289968

Prime Factorization 2 × 2 × 2 × 2 × 3 × 1693541

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10161246
Product of the distinct prime numbers

The prime factorization of 81289968 is 2 × 2 × 2 × 2 × 3 × 1693541. Since it has a total of 6 prime factors.

Most popular turbo-numbers

5, 5, 60, 28, 3, 72, 564, 7866, 1391, 74388, 913192, 830868, 5428917, 3367030, 51063659, 53019222, 39680090, 84113552, 6629862667, 2580305897

Basic calculations (n = 81289968)

Multiplication

n×y
n×2 162579936
n×3 243869904
n×4 325159872
n×5 406449840

Division

n÷y
n÷2 40644984
n÷3 27096656
n÷3 20322492
n÷5 16257993.6

Exponentiation

ny
n2 6608058897441024
n3 5.371688963151E+23
n4 4.3666442392049E+31
n5 3.5496437047235E+39

Nth Root

y√n
2√n 9016.0949418249
3√n 433.19056019686
4√n 94.953119705594
5√n 38.195077055463

Divisors of 81289968

1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 1693541, 3387082, 5080623, 6774164, 10161246, 13548328, 20322492, 27096656, 40644984, 81289968

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 -81289967
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 81289968 can be divided by 20 positive divisors. The sum of these divisors (counting 81289968) is 1, the average is 0.05.

Base conversion 81289968

Base System Value
2 Binary 100110110000110001011110000
3 Ternary 12122221221212120
4 Quaternary 10312012023300
5 Quinary 131302234333
6 Senary 12022154240
8 Octal 466061360
10 Decimal 81289968
12 Duodecimal 23282980
16 Hexadecimal 4d862f0
20 Vigesimal 15814i8
36 Base36 1cebqo

Cryptographic Hash Functions

md5 6ebaa99c12b1686d21d416e543f4e6e0
sha1 fa45fede9db07a1e32b685a94c55bf99db068ff8
sha256 25881c345e16091884b3d1e4d753bf312ecb9ecfb7733db9ed07e2b0f1b7e56d
sha512 3312d1d0aa3db850d2e7256fffd60e3a0d2da160d79f48cc7e9b4d6cd8b697464596e7c77329539c7dddc4d473c12b2b56c6bf2ebc76d229ccb5b56c37e1b8b6
ripemd-160 1c39a43f9e5482532acf95208cb7ed2bbb0459ba

81289968 as geometric shapes

Circle

Radius = n
Diameter 162579936
Circumference 510759932.5587
Area 2.0759829286689E+16

Sphere

Radius = n
Volume 2.2500878112006E+24
Surface area 8.3039317146758E+16
Circumference 510759932.5587

Square

Length = n
Perimeter 325159872
Area 6608058897441024
Diagonal 114961375.23047

Cube

Length = n
Surface area 39648353384646144
Volume 5.371688963151E+23
Space diagonal 140798354.72165

Equilateral Triangle

Length = n
Perimeter 243869904
Area 2.8613734374439E+15
Altitude 70399177.360824

Triangular Pyramid

Length = n
Surface area 2.8613734374439E+15
Volume 6.3305961537816E+22
Height 38320458.410158