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

81397918 (number)

81397918 is an even 8-digits composite number following 81397917 and preceding 81397919. In scientific notation, it is written as 8.1397918 × 10^7. The sum of its digits is 46. It has a total of 3 prime factors and 8 positive divisors. There are 34884780 positive integers (up to 81397918) that are relatively prime to 81397918.

Interesting facts

81397918 has 8 divisors, whose sum is 124588800
The reverse of 81397918 is 81979318
Previous prime number is 49

Basic properties

Is Prime? no
Number parity even
Number length 8
Sum of Digits 46
Digital Root 1

Name

Name	eighty-one million three hundred ninety-seven thousand nine hundred eighteen

Notation

Scientific notation	8.1397918 × 10^7
Engineering notation	8.1397918 × 10^6

Prime Factorization of 81397918

Prime Factorization 2 × 49 × 830591

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81397918	Product of the distinct prime numbers

The prime factorization of 81397918 is 2 × 49 × 830591. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 1, 74, 18, 624, 805, 5059, 9226, 84508, 82005, 133284, 547013, 1487347, 8428380, 81612542, 3009899, 851308188, 18869992, 3037197149, 4805984570

Basic calculations (n = 81397918)

Multiplication

n×y

n×2	162795836
n×3	244193754
n×4	325591672
n×5	406989590

Division

n÷y

n÷2	40698959
n÷3	27132639.333333
n÷3	20349479.5
n÷5	16279583.6

Exponentiation

n^y

n²	6625621054734724
n³	5.3931175931237E+23
n⁴	4.3898854360944E+31
n⁵	3.5732753475661E+39

Nth Root

^y√n

²√n	9022.0794720508
³√n	433.38222893363
⁴√n	94.98462755652
⁵√n	38.205215994507

Divisors of 81397918

1, 2, 49, 98, 830591, 1661182, 40698959, 81397918

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	-81397917	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 81397918 can be divided by 8 positive divisors. The sum of these divisors (counting 81397918) is 1, the average is 0.125.

Base conversion 81397918

Base	System	Value
2	Binary	100110110100000100010011110
3	Ternary	12200011102221201
4	Quaternary	10312200202132
5	Quinary	131314213133
6	Senary	12024350114
8	Octal	466404236
10	Decimal	81397918
12	Duodecimal	2331533a
16	Hexadecimal	4da089e
20	Vigesimal	158eefi
36	Base36	1cgn1a

Cryptographic Hash Functions

md5	554bc8df6f65ac080c0e81ce50ce6837
sha1	06b43324dd15ed8ad6ff78c6ef864a0c532f0c42
sha256	6edc41e68380d0db37e040f677b126942415e0c48e373faf02c9ccad4aabc6ad
sha512	865ef086093d323b36396b5f6cff0b738e40fa235ded4085adc9a7ea905f8f0546a7b1aae4e79c564cbef72757326c5b553659f18a087f2ee93fc37569aeec26
ripemd-160	04f62cae246150b3fba24036f441afd8041eee8a

81397918 as geometric shapes

Circle

Radius = n

Diameter	162795836
Circumference	511438202.41261
Area	2.0815002431024E+16

Sphere

Radius = n

Volume	2.2590638147338E+24
Surface area	8.3260009724098E+16
Circumference	511438202.41261

Square

Length = n

Perimeter	325591672
Area	6625621054734724
Diagonal	115114039.58453

Cube

Length = n

Surface area	39753726328408344
Volume	5.3931175931237E+23
Space diagonal	140985329.60633

Equilateral Triangle

Length = n

Perimeter	244193754
Area	2.8689780746247E+15
Altitude	70492664.803163

Triangular Pyramid

Length = n

Surface area	2.8689780746247E+15
Volume	6.3558500363904E+22
Height	38371346.528178