81709968 (number)

81709968 is an even 8-digits composite number following 81709967 and preceding 81709969. In scientific notation, it is written as 8.1709968 × 10^7. The sum of its digits is 48. It has a total of 6 prime factors and 20 positive divisors. There are 27236640 positive integers (up to 81709968) that are relatively prime to 81709968.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1709968 × 10^7
Engineering notation 8.1709968 × 10^6

Prime Factorization of 81709968

Prime Factorization 2 × 2 × 2 × 2 × 3 × 1702291

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10213746
Product of the distinct prime numbers

The prime factorization of 81709968 is 2 × 2 × 2 × 2 × 3 × 1702291. Since it has a total of 6 prime factors.

Most popular turbo-numbers

3, 2, 57, 50, 989, 815, 6852, 4154, 60329, 73004, 70995, 181454, 7336071, 2784147, 65135928, 11041540, 925166135, 494652986, 9922442833, 9125205098

Basic calculations (n = 81709968)

Multiplication

n×y
n×2 163419936
n×3 245129904
n×4 326839872
n×5 408549840

Division

n÷y
n÷2 40854984
n÷3 27236656
n÷3 20427492
n÷5 16341993.6

Exponentiation

ny
n2 6676518870561024
n3 5.4553814326494E+23
n4 4.4575904228957E+31
n5 3.6422957081192E+39

Nth Root

y√n
2√n 9039.3566142729
3√n 433.93533265993
4√n 95.075531101714
5√n 38.234464157443

Divisors of 81709968

1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 1702291, 3404582, 5106873, 6809164, 10213746, 13618328, 20427492, 27236656, 40854984, 81709968

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 -81709967
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 81709968 can be divided by 20 positive divisors. The sum of these divisors (counting 81709968) is 1, the average is 0.05.

Base conversion 81709968

Base System Value
2 Binary 100110111101100101110010000
3 Ternary 12200202022000010
4 Quaternary 10313230232100
5 Quinary 131404204333
6 Senary 12035154520
8 Octal 467545620
10 Decimal 81709968
12 Duodecimal 23445a40
16 Hexadecimal 4decb90
20 Vigesimal 15adei8
36 Base36 1cnbtc

Cryptographic Hash Functions

md5 8ea559d9b5f91000c71f2c73cab429da
sha1 420beebbb4d7197d6ca72787e1b906841adc2cc7
sha256 a47a92fe001f563547bfd603f504b55db317b5d2599057255d746a7422524d3c
sha512 722485b7ea7fd87af05743f2f838fff999937cc1a5a6b36489c2191689f248169afe44e86b93b8670bcdecdd519c75d776289389714386e8cf22421783265e42
ripemd-160 13d6d757ccd70212b429ef0af6051d80f5d66b92

81709968 as geometric shapes

Circle

Radius = n
Diameter 163419936
Circumference 513398870.38771
Area 2.0974902635308E+16

Sphere

Radius = n
Volume 2.2851448308455E+24
Surface area 8.3899610541233E+16
Circumference 513398870.38771

Square

Length = n
Perimeter 326839872
Area 6676518870561024
Diagonal 115555344.92667

Cube

Length = n
Surface area 40059113223366144
Volume 5.4553814326494E+23
Space diagonal 141525816.06083

Equilateral Triangle

Length = n
Perimeter 245129904
Area 2.891017475376E+15
Altitude 70762908.030414

Triangular Pyramid

Length = n
Surface area 2.891017475376E+15
Volume 6.4292286749759E+22
Height 38518448.308891