81680 (number)

81680 is an even 5-digits composite number following 81679 and preceding 81681. In scientific notation, it is written as 8.1680 × 10^4. The sum of its digits is 23. It has a total of 6 prime factors and 20 positive divisors. There are 32640 positive integers (up to 81680) that are relatively prime to 81680.

Interesting facts

Basic properties

Name

Name eighty-one thousand six hundred eighty

Notation

Scientific notation 8.1680 × 10^4
Engineering notation 8.1680 × 10^3

Prime Factorization of 81680

Prime Factorization 2 × 2 × 2 × 2 × 5 × 1021

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 10210
Product of the distinct prime numbers

The prime factorization of 81680 is 2 × 2 × 2 × 2 × 5 × 1021. Since it has a total of 6 prime factors.

Most popular turbo-numbers

9, 8, 31, 90, 907, 1, 2127, 828, 44690, 92016, 266710, 927888, 3666439, 3081710, 30653438, 4993104, 894093582, 149637163, 9328414849, 8093563711

Basic calculations (n = 81680)

Multiplication

n×y
n×2 163360
n×3 245040
n×4 326720
n×5 408400

Division

n÷y
n÷2 40840
n÷3 27226.666666667
n÷3 20420
n÷5 16336

Exponentiation

ny
n2 6671622400
n3 544938117632000
n4 4.4510545448182E+19
n5 3.6356213522075E+24

Nth Root

y√n
2√n 285.79713084634
3√n 43.388227603988
4√n 16.905535509008
5√n 9.6033585914717

Divisors of 81680

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021, 2042, 4084, 5105, 8168, 10210, 16336, 20420, 40840, 81680

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81679
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81680 can be divided by 20 positive divisors. The sum of these divisors (counting 81680) is 1, the average is 0.05.

Base conversion 81680

Base System Value
2 Binary 10011111100010000
3 Ternary 11011001012
4 Quaternary 103330100
5 Quinary 10103210
6 Senary 1430052
8 Octal 237420
10 Decimal 81680
12 Duodecimal 3b328
16 Hexadecimal 13f10
20 Vigesimal a440
36 Base36 1r0w

Cryptographic Hash Functions

md5 d44de8bcb1fde3ac784db894645f7109
sha1 85ef56cc05997319f58df44d4a7fcc9685e8c3b6
sha256 0a2512a0cfe90430aabf2d835ddddf1f8149bfc8845572a09b0a02a945c4909e
sha512 d2a104b41e502c9fff57cedc5faf337686b582b761cdc80013f5d80a10d04688e967c94fd9cf3ddd62bd7d616de64914be18d7d3a653ccbb0489e6d631236d2d
ripemd-160 d3c66e4e24c0757d9f00acb4212c4ac5bc7ac4f5

81680 as geometric shapes

Circle

Radius = n
Diameter 163360
Circumference 513210.57589043
Area 20959519919.365

Sphere

Radius = n
Volume 2.2826314493517E+15
Surface area 83838079677.46
Circumference 513210.57589043

Square

Length = n
Perimeter 326720
Area 6671622400
Diagonal 115512.96377463

Cube

Length = n
Surface area 40029734400
Volume 544938117632000
Space diagonal 141473.90996223

Equilateral Triangle

Length = n
Perimeter 245040
Area 2888897241.4287
Altitude 70736.954981113

Triangular Pyramid

Length = n
Surface area 2888897241.4287
Volume 64221573050770
Height 38504.321258211