128218979 is an odd 9-digits composite number following 128218978
and preceding 128218980 . In scientific notation, it is written as 1.28218979 × 10^8.
The sum of its digits is 47. It has a total of 3 prime factors and 8 positive divisors.
There are 109407816 positive integers (up to 128218979) that are relatively prime to 128218979.
128218979 has 8 divisors, whose sum is 147194880
The reverse of 128218979 is 979812821
Previous prime number is 223
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 47
Digital Root 2
Name
one hundred twenty-eight million two hundred eighteen thousand nine hundred seventy-nine
Scientific notation
1.28218979 × 10^8
Engineering notation
1.28218979 × 10^6
Prime Factorization
7 × 223 × 82139
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128218979
Product of the distinct prime numbers
The prime factorization of 128218979 is 7 × 223 × 82139.
Since it has a total of 3 prime factors.
2 , 10 , 84 , 91 , 404 , 758 , 6944 , 7385 , 77651 , 54435 , 391584 , 761882 , 6663560 , 800833 , 60898261 , 63627929 , 764294837 , 558323432 , 1090109009 , 6034737065
n×2
256437958
n×3
384656937
n×4
512875916
n×5
641094895
n÷2
64109489.5
n÷3
42739659.666667
n÷3
32054744.75
n÷5
25643795.8
n2
16440106575802441
n3
2.1079336798006E+24
n4
2.7027710422374E+32
n5
3.4654654350645E+40
2 √n
11323.381959468
3 √n
504.25564815478
4 √n
106.41138077982
5 √n
41.839883139638
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
-128218978
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 128218979 can be divided by 8 positive divisors.
The sum of these divisors (counting 128218979) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101001000111011101100011
3
Ternary
22221021012101002
4
Quaternary
13221013131203
5
Quinary
230311001404
6
Senary
20420102215
8
Octal
751073543
10
Decimal
128218979
12
Duodecimal
36b3496b
16
Hexadecimal
7a47763
20
Vigesimal
201778j
36
Base36
24c6eb
md5
363b1994fa54c3f69fde9afdd86d79de
sha1
9537191aeb8d2b0a58118e4d50562c3dc5d5be6a
sha256
cf8dec27ed548abb5a4f749a48d2d5222b7d6e44db73873ab5386b2370ba0ede
sha512
5537cf8f97f1f176ffe56ae733afbccb4e3f67134cf45b9923b86774115a9572bbc18aa675058a03ef1cd8397d7a4006094a878e9447d85204179367d7a3cd91
ripemd-160
b6101030707d3b90fd4f0cd6497c696ca09cfaf3
Diameter
256437958
Circumference
805623604.95437
Area
5.1648118042774E+16
Volume
8.829691950288E+24
Surface area
2.065924721711E+17
Circumference
805623604.95437
Perimeter
512875916
Area
16440106575802441
Diagonal
181329019.05543
Surface area
98640639454814646
Volume
2.1079336798006E+24
Space diagonal
222081786.12261
Perimeter
384656937
Area
7.1187749677843E+15
Altitude
111040893.0613
Surface area
7.1187749677843E+15
Volume
2.4842236654642E+23
Height
60443006.35181