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

81808 (number)

81808 is an even 5-digits composite number following 81807 and preceding 81809. In scientific notation, it is written as 8.1808 × 10^4. The sum of its digits is 25. It has a total of 5 prime factors and 10 positive divisors. There are 40896 positive integers (up to 81808) that are relatively prime to 81808.

Interesting facts

81808 has 10 divisors, whose sum is 158534
The reverse of 81808 is 80818
Previous prime number is 2

Basic properties

Is Prime? no
Number parity even
Number length 5
Sum of Digits 25
Digital Root 7

Name

Name	eighty-one thousand eight hundred eight

Notation

Scientific notation	8.1808 × 10^4
Engineering notation	8.1808 × 10^3

Prime Factorization of 81808

Prime Factorization 2 × 2 × 2 × 2 × 5113

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	5	Total number of prime factors
rad	Radical	10226	Product of the distinct prime numbers

The prime factorization of 81808 is 2 × 2 × 2 × 2 × 5113. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 5, 58, 7, 304, 686, 9258, 1147, 57680, 66300, 6347, 10819, 3903699, 1763315, 31061503, 61126735, 573322047, 532434717, 2721138284, 9673764415

Basic calculations (n = 81808)

Multiplication

n×y

n×2	163616
n×3	245424
n×4	327232
n×5	409040

Division

n÷y

n÷2	40904
n÷3	27269.333333333
n÷3	20452
n÷5	16361.6

Exponentiation

n^y

n²	6692548864
n³	547504037466112
n⁴	4.4790210297028E+19
n⁵	3.6641975239792E+24

Nth Root

^y√n

²√n	286.0209782516
³√n	43.410880210129
⁴√n	16.912154748925
⁵√n	9.6063665740803

Divisors of 81808

1, 2, 4, 8, 16, 5113, 10226, 20452, 40904, 81808

10 divisors

τ	Total Divisors	10	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81807	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.1	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	10	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81808 can be divided by 10 positive divisors. The sum of these divisors (counting 81808) is 1, the average is 0.1.

Base conversion 81808

Base	System	Value
2	Binary	10011111110010000
3	Ternary	11011012221
4	Quaternary	103332100
5	Quinary	10104213
6	Senary	1430424
8	Octal	237620
10	Decimal	81808
12	Duodecimal	3b414
16	Hexadecimal	13f90
20	Vigesimal	a4a8
36	Base36	1r4g

Cryptographic Hash Functions

md5	b98b8535a8ee6f19a5751263de80ede6
sha1	937f7ef7b83f5552e29639002d705d4107d83312
sha256	66d5fb001b20d294f2b4476376bb00f01bde396171d8ffecc41868de256804ed
sha512	46bf3d4417c53c0ea53e636053016b01d69ad33d3cf4be3a7890733bcefc1d0af3ca216fe980a3e0dc3ec99fb0f1f321195e8bfe0b83a1a7965256508f848b3d
ripemd-160	c1086af3bd64c10f7c308cae678e84dab904f57a

81808 as geometric shapes

Circle

Radius = n

Diameter	163616
Circumference	514014.82360975
Area	21025262344.933

Sphere

Radius = n

Volume	2.2933795492191E+15
Surface area	84101049379.732
Circumference	514014.82360975

Square

Length = n

Perimeter	327232
Area	6692548864
Diagonal	115693.98311062

Cube

Length = n

Surface area	40155293184
Volume	547504037466112
Space diagonal	141695.61246559

Equilateral Triangle

Length = n

Perimeter	245424
Area	2897958666.1463
Altitude	70847.806232797

Triangular Pyramid

Length = n

Surface area	2897958666.1463
Volume	64523969603217
Height	38564.661036873