81330388 is an even 8-digits composite number following 81330387
and preceding 81330389 . In scientific notation, it is written as 8.1330388 × 10^7.
The sum of its digits is 34. It has a total of 5 prime factors and 24 positive divisors.
There are 39559680 positive integers (up to 81330388) that are relatively prime to 81330388.
81330388 has 24 divisors, whose sum is 146217960
The reverse of 81330388 is 88303318
Previous prime number is 613
Is Prime? no Number parity even Number length 8 Sum of Digits 34 Digital Root 7
Name
eighty-one million three hundred thirty thousand three hundred eighty-eight
Scientific notation
8.1330388 × 10^7
Engineering notation
8.1330388 × 10^6
Prime Factorization
2 × 2 × 41 × 613 × 809
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
40665194 Product of the distinct prime numbers
The prime factorization of 81330388 is 2 × 2 × 41 × 613 × 809.
Since it has a total of 5 prime factors.
6 , 5 , 30 , 79 , 960 , 815 , 9917 , 2807 , 387 , 98648 , 214675 , 494290 , 3000153 , 5284842 , 97881369 , 88575528 , 779370944 , 438094971 , 8990607386 , 3121861746
n×2
162660776
n×3
243991164
n×4
325321552
n×5
406651940
n÷2
40665194
n÷3
27110129.333333
n÷3
20332597
n÷5
16266077.6
n2
6614632012230544
n3
5.3797058803193E+23
n4
4.3753356657225E+31
n5
3.5584774732345E+39
2 √n9018.3362101887
3 √n433.26234708344
4 √n94.964920945519
5 √n38.198874665634
1 , 2 , 4 , 41 , 82 , 164 , 613 , 809 , 1226 , 1618 , 2452 , 3236 , 25133 , 33169 , 50266 , 66338 , 100532 , 132676 , 495917 , 991834 , 1983668 , 20332597 , 40665194 , 81330388
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
-81330387 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 81330388 can be divided by 24 positive divisors.
The sum of these divisors (counting 81330388) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
100110110010000000011010100
3
Ternary
12200001000022121
4
Quaternary
10312100003110
5
Quinary
131310033023
6
Senary
12023105324
8
Octal
466200324
10
Decimal
81330388
12
Duodecimal
232a2244
16
Hexadecimal
4d900d4
20
Vigesimal
15865j8
36
Base36
1cf6xg
md5
8bf0ad68dba92df0caf4002f42b973ea
sha1
2a602db6318a03c40e2b247d08251d2a3ea30c4d
sha256
d05aacd2116df7c75654151ba63a1be500a23e9a0f261e803fa349638a3c4427
sha512
58189d49778c67133a53234a2f8e23c3bc3a2180327d5edb319f61cd2b7eedb5640b736e35aa1b0a2225b5c31226bdd6be383a7f624b23fd92f28679525e4b36
ripemd-160
9d5d15e74f0995163aada7273b2d22b9b3c64b06
Diameter
162660776
Circumference
511013898.90881
Area
2.0780479335823E+16
Volume
2.2534459296113E+24
Surface area
8.3121917343293E+16
Circumference
511013898.90881
Perimeter
325321552
Area
6614632012230544
Diagonal
115018537.74267
Surface area
39687792073383264
Volume
5.3797058803193E+23
Space diagonal
140868364.21529
Perimeter
243991164
Area
2.8642196796387E+15
Altitude
70434182.107645
Surface area
2.8642196796387E+15
Volume
6.3400441812715E+22
Height
38339512.580889