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

81409985 (number)

81409985 is an odd 8-digits composite number following 81409984 and preceding 81409986. In scientific notation, it is written as 8.1409985 × 10^7. The sum of its digits is 44. It has a total of 2 prime factors and 4 positive divisors. There are 65127984 positive integers (up to 81409985) that are relatively prime to 81409985.

Interesting facts

81409985 has 4 divisors, whose sum is 97691988
The reverse of 81409985 is 58990418
Previous prime number is 5

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 44
Digital Root 8

Name

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

Notation

Scientific notation	8.1409985 × 10^7
Engineering notation	8.1409985 × 10^6

Prime Factorization of 81409985

Prime Factorization 5 × 16281997

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81409985	Product of the distinct prime numbers

The prime factorization of 81409985 is 5 × 16281997. Since it has a total of 2 prime factors.

Most popular turbo-numbers

7, 6, 95, 56, 687, 343, 2971, 6403, 37899, 28519, 878382, 683630, 9194762, 8130758, 71346128, 69076776, 336533136, 653388606, 5407681547, 8718557392

Basic calculations (n = 81409985)

Multiplication

n×y

n×2	162819970
n×3	244229955
n×4	325639940
n×5	407049925

Division

n÷y

n÷2	40704992.5
n÷3	27136661.666667
n÷3	20352496.25
n÷5	16281997

Exponentiation

n^y

n²	6627585657700225
n³	5.3955164897959E+23
n⁴	4.3924891650154E+31
n⁵	3.5759247703656E+39

Nth Root

^y√n

²√n	9022.7481955333
³√n	433.40364375226
⁴√n	94.988147658186
⁵√n	38.20634868934

Divisors of 81409985

1, 5, 16281997, 81409985

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81409984	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81409985 can be divided by 4 positive divisors. The sum of these divisors (counting 81409985) is 1, the average is 0.25.

Base conversion 81409985

Base	System	Value
2	Binary	100110110100011011111000001
3	Ternary	12200012001111122
4	Quaternary	10312203133001
5	Quinary	131320104420
6	Senary	12024522025
8	Octal	466433701
10	Decimal	81409985
12	Duodecimal	23320315
16	Hexadecimal	4da37c1
20	Vigesimal	158g4j5
36	Base36	1cgwch

Cryptographic Hash Functions

md5	5a8cdde5b5c4ef873262998f22a80baa
sha1	21e17556b03f91e01f5137f649006b6774446a36
sha256	6830f358ac3d384440653bbd80bbfa4e88c61ead3683c0fed93d544b225da62e
sha512	45b0031ecad7112b33fee9a6d9ebf23ae3d46393900558e4558046e1bc444cc252ceee384a1eff990893b0f90324362c2c6a6a326c77be16f83956931e33c636
ripemd-160	6335231e2ce78de1143384be56966c67e98d2b62

81409985 as geometric shapes

Circle

Radius = n

Diameter	162819970
Circumference	511514021.60971
Area	2.0821174413268E+16

Sphere

Radius = n

Volume	2.2600686622221E+24
Surface area	8.3284697653072E+16
Circumference	511514021.60971

Square

Length = n

Perimeter	325639940
Area	6627585657700225
Diagonal	115131104.89959

Cube

Length = n

Surface area	39765513946201350
Volume	5.3955164897959E+23
Space diagonal	141006230.26342

Equilateral Triangle

Length = n

Perimeter	244229955
Area	2.8698287726629E+15
Altitude	70503115.13171

Triangular Pyramid

Length = n

Surface area	2.8698287726629E+15
Volume	6.3586771632309E+22
Height	38377034.96653