81445868 (number)

81445868 is an even 8-digits composite number following 81445867 and preceding 81445869. In scientific notation, it is written as 8.1445868 × 10^7. The sum of its digits is 44. It has a total of 4 prime factors and 12 positive divisors. There are 34905360 positive integers (up to 81445868) that are relatively prime to 81445868.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred forty-five thousand eight hundred sixty-eight

Notation

Scientific notation 8.1445868 × 10^7
Engineering notation 8.1445868 × 10^6

Prime Factorization of 81445868

Prime Factorization 2 × 2 × 7 × 2908781

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 40722934
Product of the distinct prime numbers

The prime factorization of 81445868 is 2 × 2 × 7 × 2908781. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 10, 9, 71, 742, 889, 4368, 510, 47156, 64977, 941120, 695097, 8964034, 7407883, 37761256, 87160189, 589999983, 662856180, 907124178, 1756211546

Basic calculations (n = 81445868)

Multiplication

n×y
n×2 162891736
n×3 244337604
n×4 325783472
n×5 407229340

Division

n÷y
n÷2 40722934
n÷3 27148622.666667
n÷3 20361467
n÷5 16289173.6

Exponentiation

ny
n2 6633429414273424
n3 5.4026541646223E+23
n4 4.4002385794148E+31
n5 3.5838125050752E+39

Nth Root

y√n
2√n 9024.7364504455
3√n 433.46731136661
4√n 94.998612886955
5√n 38.209716130726

Divisors of 81445868

1, 2, 4, 7, 14, 28, 2908781, 5817562, 11635124, 20361467, 40722934, 81445868

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81445867
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81445868 can be divided by 12 positive divisors. The sum of these divisors (counting 81445868) is 1, the average is 0.083333333333333.

Base conversion 81445868

Base System Value
2 Binary 100110110101100001111101100
3 Ternary 12200020212201122
4 Quaternary 10312230033230
5 Quinary 131322231433
6 Senary 12025400112
8 Octal 466541754
10 Decimal 81445868
12 Duodecimal 23339038
16 Hexadecimal 4dac3ec
20 Vigesimal 1590ed8
36 Base36 1cho18

Cryptographic Hash Functions

md5 d0c792118fcef437e10e1753d38dce78
sha1 028553d3514c304b52f587a93f4de880aeb55247
sha256 cf8be9580cc2daa4d8665eecdab58880b707037fff3eba9a4a9113fd365d6ac3
sha512 ee3c14e3cffd67302f91824646de965192292e138d3d0f4e0e67b206582e138d5408a88ff5c9b33964eeafc29ea5743af146de1a7078e154c50844a5f7124df5
ripemd-160 3840f523d3045d190e51f7b1f36171ffde0f5fd2

81445868 as geometric shapes

Circle

Radius = n
Diameter 162891736
Circumference 511739481.14809
Area 2.0839533115988E+16

Sphere

Radius = n
Volume 2.2630584844618E+24
Surface area 8.3358132463951E+16
Circumference 511739481.14809

Square

Length = n
Perimeter 325783472
Area 6633429414273424
Diagonal 115181851.12485

Cube

Length = n
Surface area 39800576485640544
Volume 5.4026541646223E+23
Space diagonal 141068381.44255

Equilateral Triangle

Length = n
Perimeter 244337604
Area 2.8723591934859E+15
Altitude 70534190.721274

Triangular Pyramid

Length = n
Surface area 2.8723591934859E+15
Volume 6.3670889936836E+22
Height 38393950.37495