81990306 (number)

81990306 is an even 8-digits composite number following 81990305 and preceding 81990307. In scientific notation, it is written as 8.1990306 × 10^7. The sum of its digits is 36. It has a total of 5 prime factors and 20 positive divisors. There are 27330048 positive integers (up to 81990306) that are relatively prime to 81990306.

Interesting facts

Basic properties

Name

Name eighty-one million nine hundred ninety thousand three hundred six

Notation

Scientific notation 8.1990306 × 10^7
Engineering notation 8.1990306 × 10^6

Prime Factorization of 81990306

Prime Factorization 2 × 3 × 9 × 3 × 506113

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 27330102
Product of the distinct prime numbers

The prime factorization of 81990306 is 2 × 3 × 9 × 3 × 506113. Since it has a total of 5 prime factors.

Most popular turbo-numbers

7, 10, 1, 21, 436, 390, 149, 2172, 94022, 22696, 243821, 867760, 3784953, 2139589, 53238814, 41627406, 355029168, 142370050, 2034910409, 7809162612

Basic calculations (n = 81990306)

Multiplication

n×y
n×2 163980612
n×3 245970918
n×4 327961224
n×5 409951530

Division

n÷y
n÷2 40995153
n÷3 27330102
n÷3 20497576.5
n÷5 16398061.2

Exponentiation

ny
n2 6722410277973636
n3 5.511724757486E+23
n4 4.5190799945406E+31
n5 3.7052075159086E+39

Nth Root

y√n
2√n 9054.84986071
3√n 434.43102781944
4√n 95.156974840051
5√n 38.260663883082

Divisors of 81990306

1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 506113, 1012226, 1518339, 3036678, 4555017, 9110034, 13665051, 27330102, 40995153, 81990306

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 -81990305
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 81990306 can be divided by 20 positive divisors. The sum of these divisors (counting 81990306) is 1, the average is 0.05.

Base conversion 81990306

Base System Value
2 Binary 100111000110001001010100010
3 Ternary 12201021112120000
4 Quaternary 10320301022202
5 Quinary 131442142211
6 Senary 12045200430
8 Octal 470611242
10 Decimal 81990306
12 Duodecimal 23560116
16 Hexadecimal 4e312a2
20 Vigesimal 15c8ff6
36 Base36 1ctc4i

Cryptographic Hash Functions

md5 85c931096c0618888e7e30ee1343aed0
sha1 deb377cf0231a074231b88e36d4c35c1e4a23b12
sha256 b84df7b74d851ac4a30589ce2a140cce496a753f08ca1c9d5d7e73319fafa5ee
sha512 a7367d401c293a6158c26e11e5d4f1ce25f8c2e6dbb40b39e136c22557ee5fcd74373419759bb42544b17c0505b6b400a05aebab6d63fa329a952a0a245c7c91
ripemd-160 fe05b0435edb1037be615866597ba9d1976a1c16

81990306 as geometric shapes

Circle

Radius = n
Diameter 163980612
Circumference 515160285.99036
Area 2.1119074743698E+16

Sphere

Radius = n
Volume 2.3087458675636E+24
Surface area 8.4476298974794E+16
Circumference 515160285.99036

Square

Length = n
Perimeter 327961224
Area 6722410277973636
Diagonal 115951802.72832

Cube

Length = n
Surface area 40334461667841816
Volume 5.511724757486E+23
Space diagonal 142011375.72012

Equilateral Triangle

Length = n
Perimeter 245970918
Area 2.9108890376934E+15
Altitude 71005687.86006

Triangular Pyramid

Length = n
Surface area 2.9108890376934E+15
Volume 6.4956299200869E+22
Height 38650600.90944