81128870 (number)

81128870 is an even 8-digits composite number following 81128869 and preceding 81128871. In scientific notation, it is written as 8.1128870 × 10^7. The sum of its digits is 35. It has a total of 5 prime factors and 24 positive divisors. There are 32132016 positive integers (up to 81128870) that are relatively prime to 81128870.

Interesting facts

Basic properties

Name

Name eighty-one million one hundred twenty-eight thousand eight hundred seventy

Notation

Scientific notation 8.1128870 × 10^7
Engineering notation 8.1128870 × 10^6

Prime Factorization of 81128870

Prime Factorization 2 × 5 × 127 × 127 × 503

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 638810
Product of the distinct prime numbers

The prime factorization of 81128870 is 2 × 5 × 127 × 127 × 503. Since it has a total of 5 prime factors.

Most popular turbo-numbers

6, 4, 64, 49, 688, 683, 9652, 6012, 85943, 75112, 860578, 57034, 6413458, 4799201, 70341814, 67411813, 877520143, 497604934, 3110595560, 2869973003

Basic calculations (n = 81128870)

Multiplication

n×y
n×2 162257740
n×3 243386610
n×4 324515480
n×5 405644350

Division

n÷y
n÷2 40564435
n÷3 27042956.666667
n÷3 20282217.5
n÷5 16225774

Exponentiation

ny
n2 6581893547476900
n3 5.3398158596709E+23
n4 4.3321322670318E+31
n5 3.5146099551483E+39

Nth Root

y√n
2√n 9007.1565990605
3√n 432.90420963634
4√n 94.906040898673
5√n 38.179926270849

Divisors of 81128870

1, 2, 5, 10, 127, 254, 503, 635, 1006, 1270, 2515, 5030, 16129, 32258, 63881, 80645, 127762, 161290, 319405, 638810, 8112887, 16225774, 40564435, 81128870

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81128869
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81128870 can be divided by 24 positive divisors. The sum of these divisors (counting 81128870) is 1, the average is 0.041666666666667.

Base conversion 81128870

Base System Value
2 Binary 100110101011110110110100110
3 Ternary 12122122202212222
4 Quaternary 10311132312212
5 Quinary 131232110440
6 Senary 12014512342
8 Octal 465366646
10 Decimal 81128870
12 Duodecimal 232056b2
16 Hexadecimal 4d5eda6
20 Vigesimal 157123a
36 Base36 1cavfq

Cryptographic Hash Functions

md5 7943345c9c716d8d010213164e03d4ec
sha1 e69aefa0c30dbb17cc0e35b493dd9486a1ddbfd0
sha256 41bf554cb2f470e054cf6b5cff608ae0150f37364b592b33f64cbb7b5322ac0f
sha512 93a6ec7635c3651fc0003f816abc952941a591523433b067c2526621c4d2506989f09db96ae42b850bf17902c1daf8bfbd9abf5f8b29b8bfaad8057e503a691f
ripemd-160 7c4be8d55f7c7cfa6167121f12c052a40273cd4a

81128870 as geometric shapes

Circle

Radius = n
Diameter 162257740
Circumference 509747723.97208
Area 2.0677628415463E+16

Sphere

Radius = n
Volume 2.2367368368353E+24
Surface area 8.2710513661854E+16
Circumference 509747723.97208

Square

Length = n
Perimeter 324515480
Area 6581893547476900
Diagonal 114733548.254

Cube

Length = n
Surface area 39491361284861400
Volume 5.3398158596709E+23
Space diagonal 140519324.80065

Equilateral Triangle

Length = n
Perimeter 243386610
Area 2.8500435085599E+15
Altitude 70259662.400325

Triangular Pyramid

Length = n
Surface area 2.8500435085599E+15
Volume 6.2930333411013E+22
Height 38244516.084668