81490 (number)

81490 is an even 5-digits composite number following 81489 and preceding 81491. In scientific notation, it is written as 8.1490 × 10^4. The sum of its digits is 22. It has a total of 4 prime factors and 16 positive divisors. There are 31360 positive integers (up to 81490) that are relatively prime to 81490.

Interesting facts

Basic properties

Name

Name eighty-one thousand four hundred ninety

Notation

Scientific notation 8.1490 × 10^4
Engineering notation 8.1490 × 10^3

Prime Factorization of 81490

Prime Factorization 2 × 29 × 5 × 281

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81490
Product of the distinct prime numbers

The prime factorization of 81490 is 2 × 29 × 5 × 281. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 10, 91, 50, 826, 365, 8688, 7231, 83160, 33035, 334544, 668356, 3000221, 3854769, 51371456, 62758946, 523858859, 15234903, 8973355552, 6931501487

Basic calculations (n = 81490)

Multiplication

n×y
n×2 162980
n×3 244470
n×4 325960
n×5 407450

Division

n÷y
n÷2 40745
n÷3 27163.333333333
n÷3 20372.5
n÷5 16298

Exponentiation

ny
n2 6640620100
n3 541144131949000
n4 4.4097835312524E+19
n5 3.5935325996176E+24

Nth Root

y√n
2√n 285.46453369902
3√n 43.354558963778
4√n 16.895695715152
5√n 9.598886656459

Divisors of 81490

1, 2, 5, 10, 29, 58, 145, 281, 290, 562, 1405, 2810, 8149, 16298, 40745, 81490

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 -81489
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 81490 can be divided by 16 positive divisors. The sum of these divisors (counting 81490) is 1, the average is 0.0625.

Base conversion 81490

Base System Value
2 Binary 10011111001010010
3 Ternary 11010210011
4 Quaternary 103321102
5 Quinary 10101430
6 Senary 1425134
8 Octal 237122
10 Decimal 81490
12 Duodecimal 3b1aa
16 Hexadecimal 13e52
20 Vigesimal a3ea
36 Base36 1qvm

Cryptographic Hash Functions

md5 0d61e032ac22da33acb0db3d54a8f4ec
sha1 8dcc964803df9bec6dfb80336e4b7b67c92b80f2
sha256 e26e42fb186d55ae82c7ffb5ebc39de94cae743ff5d452cfa6f102d5a779e59e
sha512 e7c3e97e3f5b2e55170bd9f66d44d3d66b27d12d3d47af27e6c6152244fbf883e412631d59cccec272224f0028625cbe6d31078de128b06b6b028834a6f475e4
ripemd-160 c33e09067b2750f47a44b16103fdb047db629932

81490 as geometric shapes

Circle

Radius = n
Diameter 162980
Circumference 512016.77068206
Area 20862123321.441

Sphere

Radius = n
Volume 2.2667392392856E+15
Surface area 83448493285.763
Circumference 512016.77068206

Square

Length = n
Perimeter 325960
Area 6640620100
Diagonal 115244.26319778

Cube

Length = n
Surface area 39843720600
Volume 541144131949000
Space diagonal 141144.82030879

Equilateral Triangle

Length = n
Perimeter 244470
Area 2875472851.7408
Altitude 70572.410154394

Triangular Pyramid

Length = n
Surface area 2875472851.7408
Volume 63774447550074
Height 38414.754399261