128220391 is an odd 9-digits composite number following 128220390
and preceding 128220392 . In scientific notation, it is written as 1.28220391 × 10^8.
The sum of its digits is 28. It has a total of 3 prime factors and 8 positive divisors.
There are 116689440 positive integers (up to 128220391) that are relatively prime to 128220391.
128220391 has 8 divisors, whose sum is 140029344
The reverse of 128220391 is 193022821
Previous prime number is 71
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 28
Digital Root 1
Name
one hundred twenty-eight million two hundred twenty thousand three hundred ninety-one
Scientific notation
1.28220391 × 10^8
Engineering notation
1.28220391 × 10^6
Prime Factorization
13 × 71 × 138917
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128220391
Product of the distinct prime numbers
The prime factorization of 128220391 is 13 × 71 × 138917.
Since it has a total of 3 prime factors.
9 , 9 , 17 , 6 , 605 , 558 , 6462 , 4239 , 61741 , 93300 , 378518 , 727117 , 9711310 , 1636988 , 98855629 , 94131742 , 102904660 , 962814617 , 2727020654 , 1175305857
n×2
256440782
n×3
384661173
n×4
512881564
n×5
641101955
n÷2
64110195.5
n÷3
42740130.333333
n÷3
32055097.75
n÷5
25644078.2
n2
16440468668192881
n3
2.1080033208589E+24
n4
2.7028901002983E+32
n5
3.4656562549028E+40
2 √n
11323.44430816
3 √n
504.25749917134
4 √n
106.41167374006
5 √n
41.839975290823
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128220390
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128220391 can be divided by 8 positive divisors.
The sum of these divisors (counting 128220391) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101001000111110011100111
3
Ternary
22221021021022101
4
Quaternary
13221013303213
5
Quinary
230311023031
6
Senary
20420112531
8
Octal
751076347
10
Decimal
128220391
12
Duodecimal
36b35747
16
Hexadecimal
7a47ce7
20
Vigesimal
2017ajb
36
Base36
24c7hj
md5
63ce094afff485dbabba032dc1f7dbf2
sha1
57a864d2dd10fee8c95fe0dcc3f549c628e06db6
sha256
79a13fcd4f9eadb0fa23e5e1f9bd15339550ba303508e8d0e668f9f2d676ac31
sha512
5088e870ed053cbbc3e43ab8dc6af46aee2ef1ede2d2e900b9b855e7ec05ac9402ec78148d0a420b5d00d331f12d0210ce765aba613bb07cc324ec07040624fa
ripemd-160
e8e9efaf39cb3093c6a3ea5c86556e169e4234eb
Diameter
256440782
Circumference
805632476.81202
Area
5.1649255589568E+16
Volume
8.8299836620711E+24
Surface area
2.0659702235827E+17
Circumference
805632476.81202
Perimeter
512881564
Area
16440468668192881
Diagonal
181331015.92498
Surface area
98642812009157286
Volume
2.1080033208589E+24
Space diagonal
222084231.77835
Perimeter
384661173
Area
7.1189317583886E+15
Altitude
111042115.88917
Surface area
7.1189317583886E+15
Volume
2.4843057382385E+23
Height
60443671.974994