128776821 is an odd 9-digits composite number following 128776820
and preceding 128776822 . In scientific notation, it is written as 1.28776821 × 10^8.
The sum of its digits is 42. It has a total of 3 prime factors and 8 positive divisors.
There are 83081760 positive integers (up to 128776821) that are relatively prime to 128776821.
128776821 has 8 divisors, whose sum is 177241344
The reverse of 128776821 is 128677821
Previous prime number is 31
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 42
Digital Root 6
Name
one hundred twenty-eight million seven hundred seventy-six thousand eight hundred twenty-one
Scientific notation
1.28776821 × 10^8
Engineering notation
1.28776821 × 10^6
Prime Factorization
3 × 31 × 1384697
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128776821
Product of the distinct prime numbers
The prime factorization of 128776821 is 3 × 31 × 1384697.
Since it has a total of 3 prime factors.
1 , 3 , 20 , 34 , 513 , 575 , 2575 , 7017 , 7145 , 47121 , 964724 , 2173 , 4156798 , 8857700 , 9969674 , 90942588 , 560304390 , 151453139 , 179551083 , 848648485
n×2
257553642
n×3
386330463
n×4
515107284
n×5
643884105
n÷2
64388410.5
n÷3
42925607
n÷3
32194205.25
n÷5
25755364.2
n2
16583469626866041
n3
2.1355664996979E+24
n4
2.7501146486519E+32
n5
3.5415102183892E+40
2 √n
11347.987530836
3 √n
504.98587811374
4 √n
106.52693335883
5 √n
41.876226482552
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
-128776820
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 128776821 can be divided by 8 positive divisors.
The sum of these divisors (counting 128776821) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101011001111101001110101
3
Ternary
22222022112120220
4
Quaternary
13223033221311
5
Quinary
230431324241
6
Senary
20440044553
8
Octal
753175165
10
Decimal
128776821
12
Duodecimal
37163759
16
Hexadecimal
7acfa75
20
Vigesimal
204h211
36
Base36
24o4tx
md5
640e629a35546e2dd545d9664df19ef3
sha1
d114ad75d1000e504c231eca17d70f62da277e0a
sha256
79151df62f81a4ee5e8b0834b07a039ffe6758f52bb83b3dc06088d9b39ce17b
sha512
9447675d9deda2d0ba7d95848ebf5cd905bb844cb9f1fce9b0f4661ee43d3ab5d7b6930079b26fd85da64e20ea521162368f4779afebd43edfe30417621181ef
ripemd-160
d116ccb9c2cb4c231718e63cac34af1836a51ccd
Diameter
257553642
Circumference
809128629.6125
Area
5.2098506350792E+16
Volume
8.9454400356044E+24
Surface area
2.0839402540317E+17
Circumference
809128629.6125
Perimeter
515107284
Area
16583469626866041
Diagonal
182117926.77749
Surface area
99500817761196246
Volume
2.1355664996979E+24
Space diagonal
223047996.8092
Perimeter
386330463
Area
7.1808529898768E+15
Altitude
111523998.4046
Surface area
7.1808529898768E+15
Volume
2.5167892560186E+23
Height
60705975.592497