128540987 is an odd 9-digits composite number following 128540986
and preceding 128540988 . In scientific notation, it is written as 1.28540987 × 10^8.
The sum of its digits is 44. It has a total of 2 prime factors and 4 positive divisors.
There are 128051976 positive integers (up to 128540987) that are relatively prime to 128540987.
128540987 has 4 divisors, whose sum is 129030000
The reverse of 128540987 is 789045821
Previous prime number is 263
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 44
Digital Root 8
Name
one hundred twenty-eight million five hundred forty thousand nine hundred eighty-seven
Scientific notation
1.28540987 × 10^8
Engineering notation
1.28540987 × 10^6
Prime Factorization
263 × 488749
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
128540987
Product of the distinct prime numbers
The prime factorization of 128540987 is 263 × 488749.
Since it has a total of 2 prime factors.
1 , 8 , 51 , 70 , 611 , 467 , 7978 , 4050 , 7978 , 80976 , 356152 , 702919 , 7342714 , 3645325 , 42041854 , 23440240 , 811466243 , 812854686 , 5748091810 , 9888265812
n×2
257081974
n×3
385622961
n×4
514163948
n×5
642704935
n÷2
64270493.5
n÷3
42846995.666667
n÷3
32135246.75
n÷5
25708197.4
n2
16522785338934169
n3
2.1238551354557E+24
n4
2.730024353565E+32
n5
3.5092002494128E+40
2 √n
11337.591763686
3 √n
504.67742298314
4 √n
106.47812810003
5 √n
41.860877322228
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128540986
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
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
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128540987 can be divided by 4 positive divisors.
The sum of these divisors (counting 128540987) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101010010110000100111011
3
Ternary
22221212120002022
4
Quaternary
13222112010323
5
Quinary
230401302422
6
Senary
20431025055
8
Octal
752260473
10
Decimal
128540987
12
Duodecimal
3706b18b
16
Hexadecimal
7a9613b
20
Vigesimal
2037c97
36
Base36
24j2uz
md5
04457811f3548a9cabdeb4dc89a3de5c
sha1
8f159912f8789f745e4fe509edf1e91360521b82
sha256
1c9de2cdc1de696515ffff1f5b2eccc14156052b078f6796ed3be49d86cfd676
sha512
ee1577d52ec96374833e6e6f59ed1b91dfb421b56e0d581c2d80d59d3c57da604411f915efa062bbfa0456d4fde91e1f8ff77f4fccede4363be751c19d5a8b33
ripemd-160
f122100aa8da099b36d1a8067e4be261558a777a
Diameter
257081974
Circumference
807646840.88876
Area
5.1907861037637E+16
Volume
8.8963835877822E+24
Surface area
2.0763144415055E+17
Circumference
807646840.88876
Perimeter
514163948
Area
16522785338934169
Diagonal
181784407.13622
Surface area
99136712033605014
Volume
2.1238551354557E+24
Space diagonal
222639520.33905
Perimeter
385622961
Area
7.154575922397E+15
Altitude
111319760.16953
Surface area
7.154575922397E+15
Volume
2.5029872808977E+23
Height
60594802.378741