81489730 (number)

81489730 is an even 8-digits composite number following 81489729 and preceding 81489731. In scientific notation, it is written as 8.1489730 × 10^7. The sum of its digits is 40. It has a total of 5 prime factors and 32 positive divisors. There are 27288576 positive integers (up to 81489730) that are relatively prime to 81489730.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred eighty-nine thousand seven hundred thirty

Notation

Scientific notation 8.1489730 × 10^7
Engineering notation 8.1489730 × 10^6

Prime Factorization of 81489730

Prime Factorization 2 × 5 × 7 × 43 × 27073

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 81489730
Product of the distinct prime numbers

The prime factorization of 81489730 is 2 × 5 × 7 × 43 × 27073. Since it has a total of 5 prime factors.

Most popular turbo-numbers

7, 7, 55, 27, 251, 529, 2665, 2864, 10792, 24134, 627237, 523291, 9581584, 9701631, 93197733, 67748898, 936076055, 79377654, 4405284609, 1060543550

Basic calculations (n = 81489730)

Multiplication

n×y
n×2 162979460
n×3 244469190
n×4 325958920
n×5 407448650

Division

n÷y
n÷2 40744865
n÷3 27163243.333333
n÷3 20372432.5
n÷5 16297946

Exponentiation

ny
n2 6640576095472900
n3 5.4113875306454E+23
n4 4.4097250879766E+31
n5 3.5934730679344E+39

Nth Root

y√n
2√n 9027.1662220212
3√n 433.5451108165
4√n 95.011400484474
5√n 38.213830749916

Divisors of 81489730

1, 2, 5, 7, 10, 14, 35, 43, 70, 86, 215, 301, 430, 602, 1505, 3010, 27073, 54146, 135365, 189511, 270730, 379022, 947555, 1164139, 1895110, 2328278, 5820695, 8148973, 11641390, 16297946, 40744865, 81489730

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 -81489729
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 81489730 can be divided by 32 positive divisors. The sum of these divisors (counting 81489730) is 1, the average is 0.03125.

Base conversion 81489730

Base System Value
2 Binary 100110110110110111101000010
3 Ternary 12200100002220011
4 Quaternary 10312312331002
5 Quinary 131330132410
6 Senary 12030335134
8 Octal 466667502
10 Decimal 81489730
12 Duodecimal 2335a4aa
16 Hexadecimal 4db6f42
20 Vigesimal 159646a
36 Base36 1cilvm

Cryptographic Hash Functions

md5 816f8806ff951f4997a5ed33befb5701
sha1 df6af1d71d2e3ef112a95a3aaaece8729b7f8743
sha256 a930832b2f4e4dafe86baf59f3ee52715e78e754453b9a7579c061a7949db328
sha512 e0375d02adb78c4e0f0e96fcce8733cfe1e089a6df5accb1effde12b0784edcad557c26b12b62c02009565d0a5ae41e7b98c245dc9d93b699ad5f869a4f5abf0
ripemd-160 557a2b2a65ab567286d42ff08063e6a00406ec2d

81489730 as geometric shapes

Circle

Radius = n
Diameter 162979460
Circumference 512015074.22203
Area 2.0861985077142E+16

Sphere

Radius = n
Volume 2.2667167082671E+24
Surface area 8.3447940308567E+16
Circumference 512015074.22203

Square

Length = n
Perimeter 325958920
Area 6640576095472900
Diagonal 115243881.36012

Cube

Length = n
Surface area 39843456572837400
Volume 5.4113875306454E+23
Space diagonal 141144352.65507

Equilateral Triangle

Length = n
Perimeter 244469190
Area 2.8754537972216E+15
Altitude 70572176.327535

Triangular Pyramid

Length = n
Surface area 2.8754537972216E+15
Volume 6.3773813642462E+22
Height 38414627.120041