81420912 (number)

81420912 is an even 8-digits composite number following 81420911 and preceding 81420913. In scientific notation, it is written as 8.1420912 × 10^7. The sum of its digits is 27. It has a total of 7 prime factors and 40 positive divisors. There are 27068160 positive integers (up to 81420912) that are relatively prime to 81420912.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred twenty thousand nine hundred twelve

Notation

Scientific notation 8.1420912 × 10^7
Engineering notation 8.1420912 × 10^6

Prime Factorization of 81420912

Prime Factorization 2 × 2 × 2 × 2 × 9 × 743 × 761

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 10177614
Product of the distinct prime numbers

The prime factorization of 81420912 is 2 × 2 × 2 × 2 × 9 × 743 × 761. Since it has a total of 7 prime factors.

Most popular turbo-numbers

6, 7, 37, 34, 711, 783, 7388, 2966, 51321, 23041, 197984, 473087, 3384984, 7648534, 83249541, 73478793, 936575872, 500075835, 2614366058, 5290659408

Basic calculations (n = 81420912)

Multiplication

n×y
n×2 162841824
n×3 244262736
n×4 325683648
n×5 407104560

Division

n÷y
n÷2 40710456
n÷3 27140304
n÷3 20355228
n÷5 16284182.4

Exponentiation

ny
n2 6629364910911744
n3 5.3976893702723E+23
n4 4.3948479122028E+31
n5 3.5783252511285E+39

Nth Root

y√n
2√n 9023.3537002602
3√n 433.42303363319
4√n 94.991334869346
5√n 38.207374259754

Divisors of 81420912

1, 2, 4, 8, 9, 16, 18, 36, 72, 144, 743, 761, 1486, 1522, 2972, 3044, 5944, 6088, 6687, 6849, 11888, 12176, 13374, 13698, 26748, 27396, 53496, 54792, 106992, 109584, 565423, 1130846, 2261692, 4523384, 5088807, 9046768, 10177614, 20355228, 40710456, 81420912

40 divisors

τ Total Divisors 40
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81420911
Sum of the proper positive divisors of n
A Arithmetic Mean 0.025
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 40
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81420912 can be divided by 40 positive divisors. The sum of these divisors (counting 81420912) is 1, the average is 0.025.

Base conversion 81420912

Base System Value
2 Binary 100110110100110001001110000
3 Ternary 12200012121111100
4 Quaternary 10312212021300
5 Quinary 131320432122
6 Senary 12025044400
8 Octal 466461160
10 Decimal 81420912
12 Duodecimal 23326700
16 Hexadecimal 4da6270
20 Vigesimal 158hc5c
36 Base36 1ch4s0

Cryptographic Hash Functions

md5 782cd6d99b8a020e4da41ee3176d0bdd
sha1 92a8ab59c58004a12af51db2ec6226631e277ebf
sha256 44539afe20f343f63455471f86f83a2aaf5c9db26145e69164cd5426a366da3c
sha512 7a6576d40c1ae1e0a1268f91b1e4c8a29d4fe7e8ba2ab9fd0bb3e651f2cb879aa6ec631d30b53fd257e5b9d57dcdf720995de240fba077711537045f5c793740
ripemd-160 c977d8578935c8dfe256308af0490efb7ab1236d

81420912 as geometric shapes

Circle

Radius = n
Diameter 162841824
Circumference 511582677.97556
Area 2.0826764102086E+16

Sphere

Radius = n
Volume 2.2609788362676E+24
Surface area 8.3307056408345E+16
Circumference 511582677.97556

Square

Length = n
Perimeter 325683648
Area 6629364910911744
Diagonal 115146558.01119

Cube

Length = n
Surface area 39776189465470464
Volume 5.3976893702723E+23
Space diagonal 141025156.38259

Equilateral Triangle

Length = n
Perimeter 244262736
Area 2.8705992119034E+15
Altitude 70512578.191297

Triangular Pyramid

Length = n
Surface area 2.8705992119034E+15
Volume 6.3612379274302E+22
Height 38382186.003729