128920145 is an odd 9-digits composite number following 128920144
and preceding 128920146 . In scientific notation, it is written as 1.28920145 × 10^8.
The sum of its digits is 32. It has a total of 3 prime factors and 8 positive divisors.
There are 101445120 positive integers (up to 128920145) that are relatively prime to 128920145.
128920145 has 8 divisors, whose sum is 157240680
The reverse of 128920145 is 541029821
Previous prime number is 61
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 32
Digital Root 5
Name
one hundred twenty-eight million nine hundred twenty thousand one hundred forty-five
Scientific notation
1.28920145 × 10^8
Engineering notation
1.28920145 × 10^6
Prime Factorization
5 × 61 × 422689
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128920145
Product of the distinct prime numbers
The prime factorization of 128920145 is 5 × 61 × 422689.
Since it has a total of 3 prime factors.
4 , 5 , 61 , 100 , 699 , 779 , 2380 , 7679 , 77321 , 64102 , 973331 , 136895 , 9751835 , 4540557 , 67949 , 51911450 , 697221157 , 651830830 , 6145141092 , 5502913487
n×2
257840290
n×3
386760435
n×4
515680580
n×5
644600725
n÷2
64460072.5
n÷3
42973381.666667
n÷3
32230036.25
n÷5
25784029
n2
16620403786821025
n3
2.1427048661555E+24
n4
2.7623782203697E+32
n5
3.5612620071491E+40
2 √n
11354.300727037
3 √n
505.17315240003
4 √n
106.55656116372
5 √n
41.88554368432
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
-128920144
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 128920145 can be divided by 8 positive divisors.
The sum of these divisors (counting 128920145) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101011110010101001010001
3
Ternary
22222120211012012
4
Quaternary
13223302221101
5
Quinary
231000421040
6
Senary
20443112305
8
Octal
753625121
10
Decimal
128920145
12
Duodecimal
37212695
16
Hexadecimal
7af2a51
20
Vigesimal
205f075
36
Base36
24r7f5
md5
6d4ff63f6b47e9596a9f69a4cd07f11c
sha1
f5628f2ec627cf793a227748754d37bad02ed34f
sha256
32a5348909ae50837c4945aa259ae0c8014a302022ccc041389ef0f3a3d82218
sha512
9fde0fb9c6e4ef306e696e0771d1f975766b229fb441aa2cde53370fa6747302ffabb5339060c4824c86fe728bb614e0c8e22ebdafbb5d5ee08a506cb6051563
ripemd-160
ac1078913731cdf4e571f11387ca17d97928dd28
Diameter
257840290
Circumference
810029160.86346
Area
5.2214538436373E+16
Volume
8.9753411551004E+24
Surface area
2.0885815374549E+17
Circumference
810029160.86346
Perimeter
515680580
Area
16620403786821025
Diagonal
182320617.52211
Surface area
99722422720926150
Volume
2.1427048661555E+24
Space diagonal
223296241.25915
Perimeter
386760435
Area
7.196845950271E+15
Altitude
111648120.62957
Surface area
7.196845950271E+15
Volume
2.5252019015666E+23
Height
60773539.174035