128207987 is an odd 9-digits prime number following 128207986
and preceding 128207988 . In scientific notation, it is written as 1.28207987 × 10^8.
The sum of its digits is 44. It has a total of 1 prime factors and 2 positive divisors.
There are 128207986 positive integers (up to 128207987) that are relatively prime to 128207987.
128207987 has 2 divisors, whose sum is 128207988
The reverse of 128207987 is 789702821
Previous prime number is 1
Is Prime? yes
Number parity odd
Number length 9
Sum of Digits 44
Digital Root 8
Name
one hundred twenty-eight million two hundred seven thousand nine hundred eighty-seven
Scientific notation
1.28207987 × 10^8
Engineering notation
1.28207987 × 10^6
Prime Factorization
128207987
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
128207987
Product of the distinct prime numbers
The prime factorization of 128207987 is 128207987.
Since it has a total of 1 prime factors.
3 , 10 , 40 , 42 , 359 , 92 , 6975 , 1477 , 92221 , 81091 , 186749 , 960435 , 9500511 , 3245864 , 1620066 , 24481657 , 843035028 , 295874944 , 6814418887 , 9491093356
n×2
256415974
n×3
384623961
n×4
512831948
n×5
641039935
n÷2
64103993.5
n÷3
42735995.666667
n÷3
32051996.75
n÷5
25641597.4
n2
16437287930592169
n3
2.1073915973206E+24
n4
2.7018443451319E+32
n5
3.463980246767E+40
2 √n
11322.896581706
3 √n
504.24123807673
4 √n
106.40910008879
5 √n
41.839165742306
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
128207988
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
64103994
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
11322.896625864
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9999999844003
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128207987 can be divided by 2 positive divisors.
The sum of these divisors (counting 128207987) is 128207988, the average is 64103994.
Base
System
Value
2
Binary
111101001000100110001110011
3
Ternary
22221020122021222
4
Quaternary
13221010301303
5
Quinary
230310123422
6
Senary
20415535255
8
Octal
751046163
10
Decimal
128207987
12
Duodecimal
36b2a52b
16
Hexadecimal
7a44c73
20
Vigesimal
2015jj7
36
Base36
24bxwz
md5
2e36c80ca16af7c8f219ea2c21d39b75
sha1
27372281c0b1e6ced2d2645a2bf7352ed61f8e9d
sha256
2a5ef0d15891d40bc59de7a365589a1fb542bb6a7c91b24871bc9bcd1375a54b
sha512
d7818b29106e4212fdf8e948a3b7ad6ba85b7d6b9c528a5a034e5901a5d5ab4708301eb38a4eee50c1aa9f0ab116ef2ea19d18b4121978891420dc211f20cbbf
ripemd-160
94865be37753b9a2f37cadbea5ac62bb568e1987
Diameter
256415974
Circumference
805554540.18147
Area
5.1639263007689E+16
Volume
8.8274212805057E+24
Surface area
2.0655705203075E+17
Circumference
805554540.18147
Perimeter
512831948
Area
16437287930592169
Diagonal
181313474.01995
Surface area
98623727583553014
Volume
2.1073915973206E+24
Space diagonal
222062747.42013
Perimeter
384623961
Area
7.1175544586061E+15
Altitude
111031373.71007
Surface area
7.1175544586061E+15
Volume
2.4835848151349E+23
Height
60437824.673318