128564721 is an odd 9-digits composite number following 128564720
and preceding 128564722 . In scientific notation, it is written as 1.28564721 × 10^8.
The sum of its digits is 36. It has a total of 3 prime factors and 8 positive divisors.
There are 85468920 positive integers (up to 128564721) that are relatively prime to 128564721.
128564721 has 8 divisors, whose sum is 143251200
The reverse of 128564721 is 127465821
Previous prime number is 359
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 36
Digital Root 9
Name
one hundred twenty-eight million five hundred sixty-four thousand seven hundred twenty-one
Scientific notation
1.28564721 × 10^8
Engineering notation
1.28564721 × 10^6
Prime Factorization
9 × 359 × 39791
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128564721
Product of the distinct prime numbers
The prime factorization of 128564721 is 9 × 359 × 39791.
Since it has a total of 3 prime factors.
10 , 8 , 36 , 34 , 713 , 374 , 8363 , 4340 , 66377 , 49905 , 964607 , 755601 , 5998259 , 6181131 , 60453308 , 53345266 , 240506412 , 645690798 , 1613462239 , 8419774942
n×2
257129442
n×3
385694163
n×4
514258884
n×5
642823605
n÷2
64282360.5
n÷3
42854907
n÷3
32141180.25
n÷5
25712944.2
n2
16528887485807841
n3
2.1250318080533E+24
n4
2.732041215185E+32
n5
3.5124411659075E+40
2 √n
11338.638410321
3 √n
504.70848253621
4 √n
106.48304282993
5 √n
41.862423059063
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
-128564720
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 128564721 can be divided by 8 positive divisors.
The sum of these divisors (counting 128564721) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101010011011110111110001
3
Ternary
22221220202122100
4
Quaternary
13222123313301
5
Quinary
230403032341
6
Senary
20431331013
8
Octal
752336761
10
Decimal
128564721
12
Duodecimal
37080a69
16
Hexadecimal
7a9bdf1
20
Vigesimal
203abg1
36
Base36
24jl69
md5
1fe914d7aa65c665ce97030360c65dcf
sha1
692203b6be51f014060698e34bc76ef7b9db627c
sha256
68e55f7002bda8fd883cb567a656c56b2b826a2321ad4e9925852b6e7109f0dd
sha512
4ab5b4384cd346632cb7183e98993fc86c31717ed1256acc4d5d957664ae0117919bb641c068b78d520f7c548359dee01fe19c1d00ed5f7c5bbfe8198aebda0e
ripemd-160
1d67f8a102d7080ed47e3f08738bf9b72c355731
Diameter
257129442
Circumference
807795966.00884
Area
5.1927031497426E+16
Volume
8.9013124224331E+24
Surface area
2.077081259897E+17
Circumference
807795966.00884
Perimeter
514258884
Area
16528887485807841
Diagonal
181817972.08091
Surface area
99173324914847046
Volume
2.1250318080533E+24
Space diagonal
222680628.83292
Perimeter
385694163
Area
7.1572182295021E+15
Altitude
111340314.41646
Surface area
7.1572182295021E+15
Volume
2.5043740028526E+23
Height
60605990.693638