128207865 is an odd 9-digits composite number following 128207864
and preceding 128207866 . In scientific notation, it is written as 1.28207865 × 10^8.
The sum of its digits is 39. It has a total of 3 prime factors and 8 positive divisors.
There are 65404416 positive integers (up to 128207865) that are relatively prime to 128207865.
128207865 has 8 divisors, whose sum is 142701312
The reverse of 128207865 is 568702821
Previous prime number is 23
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 39
Digital Root 3
Name
one hundred twenty-eight million two hundred seven thousand eight hundred sixty-five
Scientific notation
1.28207865 × 10^8
Engineering notation
1.28207865 × 10^6
Prime Factorization
15 × 23 × 371617
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128207865
Product of the distinct prime numbers
The prime factorization of 128207865 is 15 × 23 × 371617.
Since it has a total of 3 prime factors.
1 , 1 , 98 , 63 , 178 , 17 , 9494 , 7868 , 93133 , 89045 , 657942 , 316065 , 3392343 , 5080331 , 21436500 , 77522321 , 366341960 , 288089231 , 6739942310 , 4741204272
n×2
256415730
n×3
384623595
n×4
512831460
n×5
641039325
n÷2
64103932.5
n÷3
42735955
n÷3
32051966.25
n÷5
25641573
n2
16437256647858225
n3
2.107385581279E+24
n4
2.7018340610756E+32
n5
3.4639637655478E+40
2 √n
11322.89119439
3 √n
504.24107813493
4 √n
106.40907477462
5 √n
41.839157779651
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
-128207864
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 128207865 can be divided by 8 positive divisors.
The sum of these divisors (counting 128207865) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101001000100101111111001
3
Ternary
22221020122010110
4
Quaternary
13221010233321
5
Quinary
230310122430
6
Senary
20415534533
8
Octal
751045771
10
Decimal
128207865
12
Duodecimal
36b2a449
16
Hexadecimal
7a44bf9
20
Vigesimal
2015jd5
36
Base36
24bxtl
md5
f20c5ec88a857c14eae8106c0ac6b821
sha1
ba34aa29ca27fd06a03ebe65e3452db0487be26b
sha256
b9ce4cb9c322f93139e63a30c9ff9f60b5cf84dfc37e83950973d13736ea125a
sha512
732a1370b3ca9241ab5670331603074b71d2ac75b26dcff657550a1ff5c8db8550c6fdf498b9db7de67af04e552ea5115a51d9ca68e8c9a92a1195730c498cfe
ripemd-160
ff34894b5fb374bc910f04a862574271080945a6
Diameter
256415730
Circumference
805553773.63286
Area
5.1639164730081E+16
Volume
8.8273960805694E+24
Surface area
2.0655665892033E+17
Circumference
805553773.63286
Perimeter
512831460
Area
16437256647858225
Diagonal
181313301.4859
Surface area
98623539887149350
Volume
2.107385581279E+24
Space diagonal
222062536.10993
Perimeter
384623595
Area
7.1175409127849E+15
Altitude
111031268.05497
Surface area
7.1175409127849E+15
Volume
2.4835777251618E+23
Height
60437767.161966