81445866 (number)

81445866 is an even 8-digits composite number following 81445865 and preceding 81445867. In scientific notation, it is written as 8.1445866 × 10^7. The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors. There are 26272800 positive integers (up to 81445866) that are relatively prime to 81445866.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1445866 × 10^7
Engineering notation 8.1445866 × 10^6

Prime Factorization of 81445866

Prime Factorization 2 × 3 × 31 × 437881

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81445866
Product of the distinct prime numbers

The prime factorization of 81445866 is 2 × 3 × 31 × 437881. Since it has a total of 4 prime factors.

Most popular turbo-numbers

9, 6, 61, 13, 958, 12, 323, 6110, 58273, 32116, 596533, 914256, 4237694, 4957549, 96371825, 18718821, 275216321, 632155225, 6118141805, 3339204500

Basic calculations (n = 81445866)

Multiplication

n×y
n×2 162891732
n×3 244337598
n×4 325783464
n×5 407229330

Division

n÷y
n÷2 40722933
n÷3 27148622
n÷3 20361466.5
n÷5 16289173.2

Exponentiation

ny
n2 6633429088489956
n3 5.4026537666166E+23
n4 4.4002381472025E+31
n5 3.5838120650514E+39

Nth Root

y√n
2√n 9024.736339639
3√n 433.4673078185
4√n 94.998612303754
5√n 38.209715943069

Divisors of 81445866

1, 2, 3, 6, 31, 62, 93, 186, 437881, 875762, 1313643, 2627286, 13574311, 27148622, 40722933, 81445866

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81445865
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81445866 can be divided by 16 positive divisors. The sum of these divisors (counting 81445866) is 1, the average is 0.0625.

Base conversion 81445866

Base System Value
2 Binary 100110110101100001111101010
3 Ternary 12200020212201120
4 Quaternary 10312230033222
5 Quinary 131322231431
6 Senary 12025400110
8 Octal 466541752
10 Decimal 81445866
12 Duodecimal 23339036
16 Hexadecimal 4dac3ea
20 Vigesimal 1590ed6
36 Base36 1cho16

Cryptographic Hash Functions

md5 e441185b0566770a7eed0801f92e9163
sha1 12e1b3404948ce4f43eb528822f89657ee2d05b9
sha256 aac69a7b6d178b17e33362a30e9668f157f9d64a62228bbdde8ade3ee52d9c93
sha512 81b7f71adec8c0316e8ca534ff40d0214a6854cc1dc4fe8668176e367da2be004f8736c2411a06f3e83bc4f296b962e3520217291a267a88ad1776c3fcdcaa56
ripemd-160 a7af8ea8e6b78b135507068b3787bd9a3977b9cc

81445866 as geometric shapes

Circle

Radius = n
Diameter 162891732
Circumference 511739468.58172
Area 2.0839532092509E+16

Sphere

Radius = n
Volume 2.2630583177456E+24
Surface area 8.3358128370036E+16
Circumference 511739468.58172

Square

Length = n
Perimeter 325783464
Area 6633429088489956
Diagonal 115181848.29642

Cube

Length = n
Surface area 39800574530939736
Volume 5.4026537666166E+23
Space diagonal 141068377.97845

Equilateral Triangle

Length = n
Perimeter 244337598
Area 2.8723590524175E+15
Altitude 70534188.989223

Triangular Pyramid

Length = n
Surface area 2.8723590524175E+15
Volume 6.3670885246293E+22
Height 38393949.432141