81879920 (number)

81879920 is an even 8-digits composite number following 81879919 and preceding 81879921. In scientific notation, it is written as 8.1879920 × 10^7. The sum of its digits is 44. It has a total of 6 prime factors and 20 positive divisors. There are 32751936 positive integers (up to 81879920) that are relatively prime to 81879920.

Interesting facts

Basic properties

Name

Name eighty-one million eight hundred seventy-nine thousand nine hundred twenty

Notation

Scientific notation 8.1879920 × 10^7
Engineering notation 8.1879920 × 10^6

Prime Factorization of 81879920

Prime Factorization 2 × 2 × 2 × 2 × 5 × 1023499

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10234990
Product of the distinct prime numbers

The prime factorization of 81879920 is 2 × 2 × 2 × 2 × 5 × 1023499. Since it has a total of 6 prime factors.

Most popular turbo-numbers

9, 4, 15, 77, 306, 700, 632, 1272, 41881, 6881, 16286, 653229, 4068997, 2834143, 9843320, 63798536, 548607509, 554990296, 6475522661, 7675549814

Basic calculations (n = 81879920)

Multiplication

n×y
n×2 163759840
n×3 245639760
n×4 327519680
n×5 409399600

Division

n÷y
n÷2 40939960
n÷3 27293306.666667
n÷3 20469980
n÷5 16375984

Exponentiation

ny
n2 6704321299206400
n3 5.4894929163332E+23
n4 4.4947924082993E+31
n5 3.6803324280815E+39

Nth Root

y√n
2√n 9048.7524001931
3√n 434.23597776609
4√n 95.124930487192
5√n 38.25035603537

Divisors of 81879920

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1023499, 2046998, 4093996, 5117495, 8187992, 10234990, 16375984, 20469980, 40939960, 81879920

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 -81879919
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 81879920 can be divided by 20 positive divisors. The sum of these divisors (counting 81879920) is 1, the average is 0.05.

Base conversion 81879920

Base System Value
2 Binary 100111000010110001101110000
3 Ternary 12201001221010122
4 Quaternary 10320112031300
5 Quinary 131430124140
6 Senary 12042545412
8 Octal 470261560
10 Decimal 81879920
12 Duodecimal 23508268
16 Hexadecimal 4e16370
20 Vigesimal 15bejg0
36 Base36 1cqyy8

Cryptographic Hash Functions

md5 7fb5dcc5068ef8a3b80c1a78da9749db
sha1 633faa44c70e03682c26fb2e8046806885523f6f
sha256 5595efb23d3d5952453200183c41c60190a10c875363bb64c5bf170a7dd8a127
sha512 66fb8ab39faede36b8ad1a9c9a813569a41eafcfe835162a5bfbeccd62172e966a9b65811afe09e1f66038e74e4886112c1891727cf144db080fde9d17c4b1bb
ripemd-160 5555e9daae20af3a7a6ee1e3226bde6e411a05b2

81879920 as geometric shapes

Circle

Radius = n
Diameter 163759840
Circumference 514466710.29704
Area 2.1062246540892E+16

Sphere

Radius = n
Volume 2.2994334157181E+24
Surface area 8.424898616357E+16
Circumference 514466710.29704

Square

Length = n
Perimeter 327519680
Area 6704321299206400
Diagonal 115795693.35002

Cube

Length = n
Surface area 40225927795238400
Volume 5.4894929163332E+23
Space diagonal 141820181.55968

Equilateral Triangle

Length = n
Perimeter 245639760
Area 2.9030562801229E+15
Altitude 70910090.779838

Triangular Pyramid

Length = n
Surface area 2.9030562801229E+15
Volume 6.4694294440245E+22
Height 38598564.450008