81640 (number)

81640 is an even 5-digits composite number following 81639 and preceding 81641. In scientific notation, it is written as 8.1640 × 10^4. The sum of its digits is 19. It has a total of 6 prime factors and 32 positive divisors. There are 29952 positive integers (up to 81640) that are relatively prime to 81640.

Interesting facts

Basic properties

Name

Name eighty-one thousand six hundred forty

Notation

Scientific notation 8.1640 × 10^4
Engineering notation 8.1640 × 10^3

Prime Factorization of 81640

Prime Factorization 2 × 2 × 2 × 5 × 13 × 157

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 20410
Product of the distinct prime numbers

The prime factorization of 81640 is 2 × 2 × 2 × 5 × 13 × 157. Since it has a total of 6 prime factors.

Most popular turbo-numbers

10, 3, 5, 70, 475, 1, 2413, 2564, 91306, 44718, 962945, 541376, 703062, 5075809, 15848978, 62619267, 418939484, 133360345, 8389638444, 8093873542

Basic calculations (n = 81640)

Multiplication

n×y
n×2 163280
n×3 244920
n×4 326560
n×5 408200

Division

n÷y
n÷2 40820
n÷3 27213.333333333
n÷3 20410
n÷5 16328

Exponentiation

ny
n2 6665089600
n3 544137914944000
n4 4.4423419376028E+19
n5 3.6267279578589E+24

Nth Root

y√n
2√n 285.72714256787
3√n 43.3811438116
4√n 16.90346540115
5√n 9.6024178235666

Divisors of 81640

1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 157, 260, 314, 520, 628, 785, 1256, 1570, 2041, 3140, 4082, 6280, 8164, 10205, 16328, 20410, 40820, 81640

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81639
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81640 can be divided by 32 positive divisors. The sum of these divisors (counting 81640) is 1, the average is 0.03125.

Base conversion 81640

Base System Value
2 Binary 10011111011101000
3 Ternary 11010222201
4 Quaternary 103323220
5 Quinary 10103030
6 Senary 1425544
8 Octal 237350
10 Decimal 81640
12 Duodecimal 3b2b4
16 Hexadecimal 13ee8
20 Vigesimal a420
36 Base36 1qzs

Cryptographic Hash Functions

md5 9e16745e09e3c2f0c7a0c722a1b12af8
sha1 fd398ac1a7003f69d7a64b3f2f7ce2e86898051e
sha256 455b92131cfd1151882d668c05305941d9d617dc144e1f8be22170b16a224113
sha512 fa5ee934e54442b4ad289cc79a605d5b9d34c74778c0cfd0e7d27dd898c1ed282a9fc5894428cba0039fe326518d5a04445fffa34b06f2cf777b732c030093ec
ripemd-160 16110035574ec9a5dc7248ffefc77bcc04af4c3a

81640 as geometric shapes

Circle

Radius = n
Diameter 163280
Circumference 512959.24847814
Area 20938996522.878

Sphere

Radius = n
Volume 2.2792795681703E+15
Surface area 83755986091.511
Circumference 512959.24847814

Square

Length = n
Perimeter 326560
Area 6665089600
Diagonal 115456.39523214

Cube

Length = n
Surface area 39990537600
Volume 544137914944000
Space diagonal 141404.62792992

Equilateral Triangle

Length = n
Perimeter 244920
Area 2886068456.0497
Altitude 70702.313964962

Triangular Pyramid

Length = n
Surface area 2886068456.0497
Volume 64127268259602
Height 38485.46507738