128211815 is an odd 9-digits composite number following 128211814
and preceding 128211816 . In scientific notation, it is written as 1.28211815 × 10^8.
The sum of its digits is 29. It has a total of 4 prime factors and 12 positive divisors.
There are 99257040 positive integers (up to 128211815) that are relatively prime to 128211815.
128211815 has 12 divisors, whose sum is 158983272
The reverse of 128211815 is 518112821
Previous prime number is 31
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 29
Digital Root 2
Name
one hundred twenty-eight million two hundred eleven thousand eight hundred fifteen
Scientific notation
1.28211815 × 10^8
Engineering notation
1.28211815 × 10^6
Prime Factorization
5 × 31 × 31 × 26683
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
4135865
Product of the distinct prime numbers
The prime factorization of 128211815 is 5 × 31 × 31 × 26683.
Since it has a total of 4 prime factors.
5 , 9 , 93 , 100 , 192 , 16 , 2248 , 1481 , 1593 , 82025 , 649001 , 286245 , 2476520 , 8380464 , 76314282 , 79683665 , 28321780 , 582201878 , 6392908356 , 8266468310
n×2
256423630
n×3
384635445
n×4
512847260
n×5
641059075
n÷2
64105907.5
n÷3
42737271.666667
n÷3
32052953.75
n÷5
25642363
n2
16438269505594225
n3
2.1075803687714E+24
n4
2.7021670433855E+32
n5
3.4644974106564E+40
2 √n
11323.065618462
3 √n
504.24625652707
4 √n
106.40989436355
5 √n
41.83941558386
1 , 5 , 31 , 155 , 961 , 4805 , 26683 , 133415 , 827173 , 4135865 , 25642363 , 128211815
12 divisors
τ
Total Divisors
12
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128211814
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.083333333333333
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
12
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128211815 can be divided by 12 positive divisors.
The sum of these divisors (counting 128211815) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
111101001000101101101100111
3
Ternary
22221020211112202
4
Quaternary
13221011231213
5
Quinary
230310234230
6
Senary
20420005115
8
Octal
751055547
10
Decimal
128211815
12
Duodecimal
36b3079b
16
Hexadecimal
7a45b67
20
Vigesimal
20169af
36
Base36
24c0vb
md5
5b9445f91528a4d39f40c7d4793bbf4d
sha1
9de03b374f2eec7fda292c02ff9537369e8b8ed5
sha256
79cfe7beeb7904b76e86beb07a0c3daa2874b497d9f0b4fe214812f275ef90d5
sha512
b2e35e258b72496d11b30d80b01a446adc2a47825a1c916af254bc6a97bc5a3cba29fedfe37583b34a0a314247ff80bbb5e9ab049942b63c95bcdac3f2d3f3cf
ripemd-160
931db0dd68a2e7cc70fd2c37f24ce9de987de4f7
Diameter
256423630
Circumference
805578592.21483
Area
5.1642346716504E+16
Volume
8.8282120045097E+24
Surface area
2.0656938686602E+17
Circumference
805578592.21483
Perimeter
512847260
Area
16438269505594225
Diagonal
181318887.62947
Surface area
98629617033565350
Volume
2.1075803687714E+24
Space diagonal
222069377.71062
Perimeter
384635445
Area
7.1179794930498E+15
Altitude
111034688.85531
Surface area
7.1179794930498E+15
Volume
2.4838072844232E+23
Height
60439629.209823