128665621 is an odd 9-digits composite number following 128665620
and preceding 128665622 . In scientific notation, it is written as 1.28665621 × 10^8.
The sum of its digits is 37. It has a total of 3 prime factors and 6 positive divisors.
There are 110284776 positive integers (up to 128665621) that are relatively prime to 128665621.
128665621 has 6 divisors, whose sum is 149672310
The reverse of 128665621 is 126566821
Previous prime number is 7
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 37
Digital Root 1
Name
one hundred twenty-eight million six hundred sixty-five thousand six hundred twenty-one
Scientific notation
1.28665621 × 10^8
Engineering notation
1.28665621 × 10^6
Prime Factorization
7 × 7 × 2625829
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
18380803
Product of the distinct prime numbers
The prime factorization of 128665621 is 7 × 7 × 2625829.
Since it has a total of 3 prime factors.
10 , 9 , 23 , 85 , 541 , 809 , 6996 , 7006 , 94734 , 34030 , 250362 , 51151 , 392270 , 559101 , 90274543 , 2120230 , 625173112 , 264277577 , 8796924353 , 2589733818
n×2
257331242
n×3
385996863
n×4
514662484
n×5
643328105
n÷2
64332810.5
n÷3
42888540.333333
n÷3
32166405.25
n÷5
25733124.2
n2
16554842027315641
n3
2.1300390300015E+24
n4
2.7406279454938E+32
n5
3.5262459653691E+40
2 √n
11343.086925524
3 √n
504.84048289882
4 √n
106.50392915533
5 √n
41.868991879924
6 divisors
τ
Total Divisors
6
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128665620
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.16666666666667
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
6
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128665621 can be divided by 6 positive divisors.
The sum of these divisors (counting 128665621) is 1, the average is 0.16666666666667.
Base
System
Value
2
Binary
111101010110100100000010101
3
Ternary
22222002220001101
4
Quaternary
13222310200111
5
Quinary
230414244441
6
Senary
20433430101
8
Octal
752644025
10
Decimal
128665621
12
Duodecimal
3710b331
16
Hexadecimal
7ab4815
20
Vigesimal
2043411
36
Base36
24lr11
md5
e8436746a464c4bf359b5f1b5f5f89c7
sha1
9ccc32dd01efe11bbf2dbf9b28d20344cfb297ed
sha256
bd71294f2e3214ab27b88ab666b694d48eaec0329b61f3c915172ab70135c8e0
sha512
60722e4f5dd17b68285e8083e6eb94e738db772c49511a993d7d26a1a6e4594c30da468fe8e344cd854e88ae4d3e2d8ed3a02ce5f35b9728c28cae52514c0469
ripemd-160
ad2d2c6fb2154239711a40806cb05e4cbaf3ccb1
Diameter
257331242
Circumference
808429939.40634
Area
5.2008570094354E+16
Volume
8.9222866246828E+24
Surface area
2.0803428037742E+17
Circumference
808429939.40634
Perimeter
514662484
Area
16554842027315641
Diagonal
181960666.22936
Surface area
99329052163893846
Volume
2.1300390300015E+24
Space diagonal
222855392.7594
Perimeter
385996863
Area
7.1684568756468E+15
Altitude
111427696.3797
Surface area
7.1684568756468E+15
Volume
2.5102750705101E+23
Height
60653555.409786