81609920 (number)

81609920 is an even 8-digits composite number following 81609919 and preceding 81609921. In scientific notation, it is written as 8.1609920 × 10^7. The sum of its digits is 35. It has a total of 8 prime factors and 28 positive divisors. There are 27979776 positive integers (up to 81609920) that are relatively prime to 81609920.

Interesting facts

Basic properties

Name

Name eighty-one million six hundred nine thousand nine hundred twenty

Notation

Scientific notation 8.1609920 × 10^7
Engineering notation 8.1609920 × 10^6

Prime Factorization of 81609920

Prime Factorization 2 × 2 × 2 × 2 × 2 × 2 × 35 × 36433

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 8
Total number of prime factors
rad Radical 2550310
Product of the distinct prime numbers

The prime factorization of 81609920 is 2 × 2 × 2 × 2 × 2 × 2 × 35 × 36433. Since it has a total of 8 prime factors.

Most popular turbo-numbers

5, 6, 15, 50, 288, 118, 8810, 7358, 55910, 33508, 300295, 268735, 8475051, 4007929, 9198821, 13323699, 334454207, 114168598, 6562833663, 2393120542

Basic calculations (n = 81609920)

Multiplication

n×y
n×2 163219840
n×3 244829760
n×4 326439680
n×5 408049600

Division

n÷y
n÷2 40804960
n÷3 27203306.666667
n÷3 20402480
n÷5 16321984

Exponentiation

ny
n2 6660179042406400
n3 5.4353667883646E+23
n4 4.4357984876909E+31
n5 3.6200515971658E+39

Nth Root

y√n
2√n 9033.8208970513
3√n 433.75815275338
4√n 95.046414435534
5√n 38.225096496056

Divisors of 81609920

1, 2, 4, 8, 16, 32, 35, 64, 70, 140, 280, 560, 1120, 2240, 36433, 72866, 145732, 291464, 582928, 1165856, 1275155, 2331712, 2550310, 5100620, 10201240, 20402480, 40804960, 81609920

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 -81609919
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 81609920 can be divided by 28 positive divisors. The sum of these divisors (counting 81609920) is 1, the average is 0.035714285714286.

Base conversion 81609920

Base System Value
2 Binary 100110111010100010011000000
3 Ternary 12200120012202122
4 Quaternary 10313110103000
5 Quinary 131343004140
6 Senary 12033103412
8 Octal 467242300
10 Decimal 81609920
12 Duodecimal 233b7b68
16 Hexadecimal 4dd44c0
20 Vigesimal 15a14g0
36 Base36 1cl6m8

Cryptographic Hash Functions

md5 5a1492ae4e3071fa9f60d72ce7ddb083
sha1 e6830be736e0d5787dff64acdfbf6f470346a524
sha256 9bd09e6e95f9acffa14aba3259a3b8871911b454a63d5153b5a6264b2c83c7c4
sha512 4304f877bc912e43484af122b7eaae9f6377919930d67becfa0183b3699cd473e1950d8e9362a8941857c528ded63f59f9902356c7142ba08d38556afe91c2a7
ripemd-160 b5c77e1b0be7fe2a77cd706969a21da51d666492

81609920 as geometric shapes

Circle

Radius = n
Diameter 163219840
Circumference 512770250.2641
Area 2.0923569551217E+16

Sphere

Radius = n
Volume 2.2767611162523E+24
Surface area 8.3694278204867E+16
Circumference 512770250.2641

Square

Length = n
Perimeter 326439680
Area 6660179042406400
Diagonal 115413855.68818

Cube

Length = n
Surface area 39961074254438400
Volume 5.4353667883646E+23
Space diagonal 141352527.84163

Equilateral Triangle

Length = n
Perimeter 244829760
Area 2.8839421222383E+15
Altitude 70676263.920816

Triangular Pyramid

Length = n
Surface area 2.8839421222383E+15
Volume 6.4056411904813E+22
Height 38471285.229394