81288730 (number)

81288730 is an even 8-digits composite number following 81288729 and preceding 81288731. In scientific notation, it is written as 8.1288730 × 10^7. The sum of its digits is 37. It has a total of 4 prime factors and 16 positive divisors. There are 30602752 positive integers (up to 81288730) that are relatively prime to 81288730.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eighty-eight thousand seven hundred thirty

Notation

Scientific notation 8.1288730 × 10^7
Engineering notation 8.1288730 × 10^6

Prime Factorization of 81288730

Prime Factorization 2 × 5 × 17 × 478169

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81288730
Product of the distinct prime numbers

The prime factorization of 81288730 is 2 × 5 × 17 × 478169. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 8, 60, 88, 228, 929, 2926, 4690, 73931, 91296, 658341, 382295, 814933, 813790, 1550380, 53397000, 819616966, 410420752, 6071193368, 6910116101

Basic calculations (n = 81288730)

Multiplication

n×y
n×2 162577460
n×3 243866190
n×4 325154920
n×5 406443650

Division

n÷y
n÷2 40644365
n÷3 27096243.333333
n÷3 20322182.5
n÷5 16257746

Exponentiation

ny
n2 6607857625012900
n3 5.3714435435811E+23
n4 4.3663782392441E+31
n5 3.5493734176779E+39

Nth Root

y√n
2√n 9016.0262865633
3√n 433.18836110371
4√n 94.952758183021
5√n 38.194960716892

Divisors of 81288730

1, 2, 5, 10, 17, 34, 85, 170, 478169, 956338, 2390845, 4781690, 8128873, 16257746, 40644365, 81288730

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 -81288729
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 81288730 can be divided by 16 positive divisors. The sum of these divisors (counting 81288730) is 1, the average is 0.0625.

Base conversion 81288730

Base System Value
2 Binary 100110110000101111000011010
3 Ternary 12122221220011201
4 Quaternary 10312011320122
5 Quinary 131302214410
6 Senary 12022144414
8 Octal 466057032
10 Decimal 81288730
12 Duodecimal 2328210a
16 Hexadecimal 4d85e1a
20 Vigesimal 15811ga
36 Base36 1ceasa

Cryptographic Hash Functions

md5 b444c8cc9b393446f105674bbc94bd48
sha1 3d29467aee071b3ccfde43758c0c1c70032b10ed
sha256 d4b7b90791a639799cd6740dafc41c6171993229207660f4a9e2e92205cfff41
sha512 1245e8274c27d88a0fdeccffe74ec44c3c7eb6140e767dd1ac21a20ccb96dcdb910fab6aa5c34ea71b849725042a26f3bf9afd359832daa2c2fe1832179367b6
ripemd-160 3acfb4ec13e6124b8a4eef6536aae53f7725a76a

81288730 as geometric shapes

Circle

Radius = n
Diameter 162577460
Circumference 510752153.97529
Area 2.0759196970708E+16

Sphere

Radius = n
Volume 2.2499850100916E+24
Surface area 8.3036787882831E+16
Circumference 510752153.97529

Square

Length = n
Perimeter 325154920
Area 6607857625012900
Diagonal 114959624.43408

Cube

Length = n
Surface area 39647145750077400
Volume 5.3714435435811E+23
Space diagonal 140796210.44275

Equilateral Triangle

Length = n
Perimeter 243866190
Area 2.8612862839259E+15
Altitude 70398105.221374

Triangular Pyramid

Length = n
Surface area 2.8612862839259E+15
Volume 6.3303069240449E+22
Height 38319874.811362