81128520 (number)

81128520 is an even 8-digits composite number following 81128519 and preceding 81128521. In scientific notation, it is written as 8.1128520 × 10^7. The sum of its digits is 27. It has a total of 7 prime factors and 64 positive divisors. There are 19664640 positive integers (up to 81128520) that are relatively prime to 81128520.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1128520 × 10^7
Engineering notation 8.1128520 × 10^6

Prime Factorization of 81128520

Prime Factorization 2 × 2 × 2 × 45 × 3 × 11 × 6829

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 20282130
Product of the distinct prime numbers

The prime factorization of 81128520 is 2 × 2 × 2 × 45 × 3 × 11 × 6829. Since it has a total of 7 prime factors.

Most popular turbo-numbers

3, 3, 35, 37, 447, 726, 4367, 8035, 41231, 54506, 817113, 688447, 9789331, 3533269, 68408124, 69311126, 634423275, 254493922, 3552176241, 592106373

Basic calculations (n = 81128520)

Multiplication

n×y
n×2 162257040
n×3 243385560
n×4 324514080
n×5 405642600

Division

n÷y
n÷2 40564260
n÷3 27042840
n÷3 20282130
n÷5 16225704

Exponentiation

ny
n2 6581836757390400
n3 5.3397467500868E+23
n4 4.3320575100935E+31
n5 3.5145341434877E+39

Nth Root

y√n
2√n 9007.1371700447
3√n 432.90358710131
4√n 94.905938539401
5√n 38.179893328205

Divisors of 81128520

1, 2, 3, 4, 6, 8, 11, 12, 22, 24, 33, 44, 45, 66, 88, 90, 132, 135, 180, 264, 270, 360, 495, 540, 990, 1080, 1485, 1980, 2970, 3960, 5940, 6829, 11880, 13658, 20487, 27316, 40974, 54632, 75119, 81948, 150238, 163896, 225357, 300476, 307305, 450714, 600952, 614610, 901428, 921915, 1229220, 1802856, 1843830, 2458440, 3380355, 3687660, 6760710, 7375320, 10141065, 13521420, 20282130, 27042840, 40564260, 81128520

64 divisors

τ Total Divisors 64
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81128519
Sum of the proper positive divisors of n
A Arithmetic Mean 0.015625
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 64
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81128520 can be divided by 64 positive divisors. The sum of these divisors (counting 81128520) is 1, the average is 0.015625.

Base conversion 81128520

Base System Value
2 Binary 100110101011110110001001000
3 Ternary 12122122202102000
4 Quaternary 10311132301020
5 Quinary 131232103040
6 Senary 12014511000
8 Octal 465366110
10 Decimal 81128520
12 Duodecimal 23205460
16 Hexadecimal 4d5ec48
20 Vigesimal 1571160
36 Base36 1cav60

Cryptographic Hash Functions

md5 8c37a59d6c6b9ac93808a1a38c0ab7dd
sha1 d1429041a66929a70d4eaf72427bde1fc85e90cc
sha256 cf999a22001ba09a6e27a82d8e2eba169714445062e699065fbcb8fc23fe6ba9
sha512 4af3bcd853486ab44548ea48500b196c8e68aae5b2d4e42c7fb317f7a3c59ac372fac74629b24b70eb9e393984bd499c55f2ba2aba4079e65a43000b2834c805
ripemd-160 427464483cea2fa8e697000bce0c14038506dc07

81128520 as geometric shapes

Circle

Radius = n
Diameter 162257040
Circumference 509745524.85723
Area 2.0677450004145E+16

Sphere

Radius = n
Volume 2.2367078882804E+24
Surface area 8.270980001658E+16
Circumference 509745524.85723

Square

Length = n
Perimeter 324514080
Area 6581836757390400
Diagonal 114733053.27926

Cube

Length = n
Surface area 39491020544342400
Volume 5.3397467500868E+23
Space diagonal 140518718.58287

Equilateral Triangle

Length = n
Perimeter 243385560
Area 2.8500189177311E+15
Altitude 70259359.291434

Triangular Pyramid

Length = n
Surface area 2.8500189177311E+15
Volume 6.2929518946754E+22
Height 38244351.093086