128127981 is an odd 9-digits composite number following 128127980
and preceding 128127982 . In scientific notation, it is written as 1.28127981 × 10^8.
The sum of its digits is 39. It has a total of 2 prime factors and 4 positive divisors.
There are 85418652 positive integers (up to 128127981) that are relatively prime to 128127981.
128127981 has 4 divisors, whose sum is 170837312
The reverse of 128127981 is 189721821
Previous prime number is 3
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 39
Digital Root 3
Name
one hundred twenty-eight million one hundred twenty-seven thousand nine hundred eighty-one
Scientific notation
1.28127981 × 10^8
Engineering notation
1.28127981 × 10^6
Prime Factorization
3 × 42709327
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
128127981
Product of the distinct prime numbers
The prime factorization of 128127981 is 3 × 42709327.
Since it has a total of 2 prime factors.
4 , 5 , 57 , 8 , 252 , 914 , 5937 , 9739 , 78405 , 13131 , 731962 , 377617 , 7997144 , 9006552 , 97992414 , 10528947 , 936927488 , 858668614 , 6054229901 , 7737995701
n×2
256255962
n×3
384383943
n×4
512511924
n×5
640639905
n÷2
64063990.5
n÷3
42709327
n÷3
32031995.25
n÷5
25625596.2
n2
16416779515136361
n3
2.1034488137966E+24
n4
2.695106496486E+32
n5
3.4531855397474E+40
2 √n
11319.363100458
3 √n
504.13632854654
4 √n
106.39249550818
5 √n
41.833942635327
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
-128127980
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 128127981 can be divided by 4 positive divisors.
The sum of these divisors (counting 128127981) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101000110001001111101101
3
Ternary
22221002120112210
4
Quaternary
13220301033231
5
Quinary
230300043411
6
Senary
20414121033
8
Octal
750611755
10
Decimal
128127981
12
Duodecimal
36ab0179
16
Hexadecimal
7a313ed
20
Vigesimal
200fjj1
36
Base36
24a86l
md5
62b2f4ba0e57254633ae4b6bad34db35
sha1
4bbb4bf8466df0e935fd1af58cd923dc199e3d58
sha256
a3635f2c1b29237d30633ba69cc8d88357554b51f5ef45d324a2d0c8a9242915
sha512
6fcb4473ba1fb46a12b093bab139687f5b59f1b67d64dfa4eb701c4375cce34c845dcdfcbe2b596c4dc93ec224a76de9073cec2d716d07a547eb6ae0f12b1c56
ripemd-160
1f2914b5a86c7113d336841934aa45e4f44f6e00
Diameter
256255962
Circumference
805051847.65779
Area
5.1574833920356E+16
Volume
8.8109057875007E+24
Surface area
2.0629933568142E+17
Circumference
805051847.65779
Perimeter
512511924
Area
16416779515136361
Diagonal
181200328.44968
Surface area
98500677090818166
Volume
2.1034488137966E+24
Space diagonal
221924172.96322
Perimeter
384383943
Area
7.108674054218E+15
Altitude
110962086.48161
Surface area
7.108674054218E+15
Volume
2.4789382001906E+23
Height
60400109.483227