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

81090985 (number)

81090985 is an odd 8-digits composite number following 81090984 and preceding 81090986. In scientific notation, it is written as 8.1090985 × 10^7. The sum of its digits is 40. It has a total of 4 prime factors and 16 positive divisors. There are 61587328 positive integers (up to 81090985) that are relatively prime to 81090985.

Interesting facts

81090985 has 16 divisors, whose sum is 102301056
The reverse of 81090985 is 58909018
Previous prime number is 137

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 40
Digital Root 4

Name

Name	eighty-one million ninety thousand nine hundred eighty-five

Notation

Scientific notation	8.1090985 × 10^7
Engineering notation	8.1090985 × 10^6

Prime Factorization of 81090985

Prime Factorization 5 × 23 × 137 × 5147

Composite number

ω	Distinct Factors	4	Total number of distinct prime factors
Ω	Total Factors	4	Total number of prime factors
rad	Radical	81090985	Product of the distinct prime numbers

The prime factorization of 81090985 is 5 × 23 × 137 × 5147. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 9, 73, 32, 313, 278, 6464, 5178, 94988, 41712, 919557, 543220, 5416081, 2619311, 78184273, 38545529, 552378813, 616416896, 3433018179, 8768212619

Basic calculations (n = 81090985)

Multiplication

n×y

n×2	162181970
n×3	243272955
n×4	324363940
n×5	405454925

Division

n÷y

n÷2	40545492.5
n÷3	27030328.333333
n÷3	20272746.25
n÷5	16218197

Exponentiation

n^y

n²	6575747848270225
n³	5.3323387012786E+23
n⁴	4.324045976403E+31
n⁵	3.5064114741181E+39

Nth Root

^y√n

²√n	9005.0533035624
³√n	432.83681427091
⁴√n	94.894959315879
⁵√n	38.176359804896

Divisors of 81090985

1, 5, 23, 115, 137, 685, 3151, 5147, 15755, 25735, 118381, 591905, 705139, 3525695, 16218197, 81090985

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	-81090984	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 81090985 can be divided by 16 positive divisors. The sum of these divisors (counting 81090985) is 1, the average is 0.0625.

Base conversion 81090985

Base	System	Value
2	Binary	100110101010101100110101001
3	Ternary	12122120211220211
4	Quaternary	10311111212221
5	Quinary	131224402420
6	Senary	12014021121
8	Octal	465254651
10	Decimal	81090985
12	Duodecimal	231a77a1
16	Hexadecimal	4d559a9
20	Vigesimal	156g795
36	Base36	1ca27d

Cryptographic Hash Functions

md5	9a04ed1fa0609ef3f9713c003aec687c
sha1	47fcd1b5ea6c75098d75ad08034ede4c0086788a
sha256	aec437f571f6bac9c28df451a827be6e1d41d1a7fb434cdcb1e0172c3b6ba739
sha512	ef4227778e4806086a34821a6b67f8e00de42aa43600e010216f015e827509c8bf63c3f8acd55d6d868f8a7d0e2cbbfaac07e306b672eab3f28b9b04efdbf0ef
ripemd-160	b0d95e0fccf67e50e7263ef580b7aaa25624fe57

81090985 as geometric shapes

Circle

Radius = n

Diameter	162181970
Circumference	509509685.49672
Area	2.0658321131985E+16

Sphere

Radius = n

Volume	2.2336048120519E+24
Surface area	8.2633284527939E+16
Circumference	509509685.49672

Square

Length = n

Perimeter	324363940
Area	6575747848270225
Diagonal	114679970.77319

Cube

Length = n

Surface area	39454487089621350
Volume	5.3323387012786E+23
Space diagonal	140453706.05581

Equilateral Triangle

Length = n

Perimeter	243272955
Area	2.8473823427414E+15
Altitude	70226853.027903

Triangular Pyramid

Length = n

Surface area	2.8473823427414E+15
Volume	6.2842214254293E+22
Height	38226656.924398