Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81091390 (number)

81091390 is an even 8-digits composite number following 81091389 and preceding 81091391. In scientific notation, it is written as 8.1091390 × 10^7. The sum of its digits is 31. It has a total of 3 prime factors and 8 positive divisors. There are 32436552 positive integers (up to 81091390) that are relatively prime to 81091390.

Interesting facts

81091390 has 8 divisors, whose sum is 145964520
The reverse of 81091390 is 09319018
Previous prime number is 5

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 31
Digital Root 4

Name

Name	eighty-one million ninety-one thousand three hundred ninety

Notation

Scientific notation	8.1091390 × 10^7
Engineering notation	8.1091390 × 10^6

Prime Factorization of 81091390

Prime Factorization 2 × 5 × 8109139

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81091390	Product of the distinct prime numbers

The prime factorization of 81091390 is 2 × 5 × 8109139. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 3, 65, 44, 749, 519, 7507, 7905, 58725, 9551, 964431, 763632, 6523657, 7956183, 5267898, 13215944, 44408489, 856726626, 5265922846, 7670896915

Basic calculations (n = 81091390)

Multiplication

n×y

n×2	162182780
n×3	243274170
n×4	324365560
n×5	405456950

Division

n÷y

n÷2	40545695
n÷3	27030463.333333
n÷3	20272847.5
n÷5	16218278

Exponentiation

n^y

n²	6575813532132100
n³	5.332418597014E+23
n⁴	4.3241323609372E+31
n⁵	3.5064990369238E+39

Nth Root

^y√n

²√n	9005.0757909081
³√n	432.83753485499
⁴√n	94.895077801265
⁵√n	38.176397938345

Divisors of 81091390

1, 2, 5, 10, 8109139, 16218278, 40545695, 81091390

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81091389	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81091390 can be divided by 8 positive divisors. The sum of these divisors (counting 81091390) is 1, the average is 0.125.

Base conversion 81091390

Base	System	Value
2	Binary	100110101010101101100111110
3	Ternary	12122120212110211
4	Quaternary	10311111230332
5	Quinary	131224411030
6	Senary	12014023034
8	Octal	465255476
10	Decimal	81091390
12	Duodecimal	231a7a7a
16	Hexadecimal	4d55b3e
20	Vigesimal	156g89a
36	Base36	1ca2im

Cryptographic Hash Functions

md5	2b0301a1620b6ef85a2b935760bebd26
sha1	c1fe870e74f60b73dc7dadd1561ec8f2aabe8590
sha256	4a9f1e85dd5a57e64f73282c9f2e61857c2f44a8c5fb07696c52fea4a88fb9c5
sha512	12fba6973ee127a6057103e9e6c40953dfcd9bb446cb27db5a3b095f904a5792d054795247205b5b04dee4493aedfdf35be967e7b157763a6fa4369a859b5e92
ripemd-160	38439998e3482ee43a08c712ca140880a1971230

81091390 as geometric shapes

Circle

Radius = n

Diameter	162182780
Circumference	509512230.18677
Area	2.0658527483923E+16

Sphere

Radius = n

Volume	2.2336382786993E+24
Surface area	8.263410993569E+16
Circumference	509512230.18677

Square

Length = n

Perimeter	324365560
Area	6575813532132100
Diagonal	114680543.52969

Cube

Length = n

Surface area	39454881192792600
Volume	5.332418597014E+23
Space diagonal	140454407.53638

Equilateral Triangle

Length = n

Perimeter	243274170
Area	2.8474107846879E+15
Altitude	70227203.768191

Triangular Pyramid

Length = n

Surface area	2.8474107846879E+15
Volume	6.2843155834564E+22
Height	38226847.843229