128186721 is an odd 9-digits composite number following 128186720
and preceding 128186722 . In scientific notation, it is written as 1.28186721 × 10^8.
The sum of its digits is 36. It has a total of 2 prime factors and 4 positive divisors.
There are 78884064 positive integers (up to 128186721) that are relatively prime to 128186721.
128186721 has 4 divisors, whose sum is 129282452
The reverse of 128186721 is 127681821
Previous prime number is 117
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 36
Digital Root 9
Name
one hundred twenty-eight million one hundred eighty-six thousand seven hundred twenty-one
Scientific notation
1.28186721 × 10^8
Engineering notation
1.28186721 × 10^6
Prime Factorization
117 × 1095613
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
128186721
Product of the distinct prime numbers
The prime factorization of 128186721 is 117 × 1095613.
Since it has a total of 2 prime factors.
8 , 6 , 92 , 22 , 762 , 55 , 1804 , 2950 , 37078 , 82258 , 525248 , 846287 , 8599266 , 2130668 , 66118103 , 86195259 , 178237260 , 430091573 , 967647896 , 4039031596
n×2
256373442
n×3
384560163
n×4
512746884
n×5
640933605
n÷2
64093360.5
n÷3
42728907
n÷3
32046680.25
n÷5
25637344.2
n2
16431835440731841
n3
2.106343105159E+24
n4
2.7000521595129E+32
n5
3.4611083285693E+40
2 √n
11321.957472098
3 √n
504.21335685195
4 √n
106.40468726564
5 √n
41.837777668507
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
-128186720
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 128186721 can be divided by 4 positive divisors.
The sum of these divisors (counting 128186721) is 1, the average is 0.25.
Base
System
Value
2
Binary
111101000111111100101100001
3
Ternary
22221012120010100
4
Quaternary
13220333211201
5
Quinary
230303433341
6
Senary
20415253013
8
Octal
750774541
10
Decimal
128186721
12
Duodecimal
36b1a169
16
Hexadecimal
7a3f961
20
Vigesimal
20136g1
36
Base36
24bhi9
md5
ebdb94a63cf63408bce9c2aad8e9f743
sha1
c76a01166a687cc1cc1816491dc0556f60b30840
sha256
281271dffdc386e2db4b2ae060c249a5afeafc40c2f023d8ac8a6901e4a773db
sha512
852716f6110155bd2a547424d39a114b0c79b82e4b7d05d0295dc86060f1d6ce701f4f7d45d6298607fe1834e6f16174763cb75362e148c24920562cf63f3c10
ripemd-160
80ab82f8022ab9c819f387cdecdf52b519e9bf56
Diameter
256373442
Circumference
805420921.96273
Area
5.16221335056E+16
Volume
8.8230293668094E+24
Surface area
2.064885340224E+17
Circumference
805420921.96273
Perimeter
512746884
Area
16431835440731841
Diagonal
181283399.35434
Surface area
98591012644391046
Volume
2.106343105159E+24
Space diagonal
222025913.62766
Perimeter
384560163
Area
7.1151934612396E+15
Altitude
111012956.81383
Surface area
7.1151934612396E+15
Volume
2.4823491552724E+23
Height
60427799.784779