128215857 is an odd 9-digits composite number following 128215856
and preceding 128215858 . In scientific notation, it is written as 1.28215857 × 10^8.
The sum of its digits is 39. It has a total of 4 prime factors and 16 positive divisors.
There are 62337600 positive integers (up to 128215857) that are relatively prime to 128215857.
128215857 has 16 divisors, whose sum is 148549632
The reverse of 128215857 is 758512821
Previous prime number is 131
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 39
Digital Root 3
Name
one hundred twenty-eight million two hundred fifteen thousand eight hundred fifty-seven
Scientific notation
1.28215857 × 10^8
Engineering notation
1.28215857 × 10^6
Prime Factorization
627 × 7 × 131 × 223
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
128215857
Product of the distinct prime numbers
The prime factorization of 128215857 is 627 × 7 × 131 × 223.
Since it has a total of 4 prime factors.
5 , 10 , 25 , 13 , 359 , 521 , 8443 , 4845 , 57898 , 5251 , 16137 , 604958 , 4576153 , 5198096 , 36815571 , 61964282 , 12909594 , 848579495 , 6224343410 , 6278193289
n×2
256431714
n×3
384647571
n×4
512863428
n×5
641079285
n÷2
64107928.5
n÷3
42738619
n÷3
32053964.25
n÷5
25643171.4
n2
16439305986244449
n3
2.1077797055116E+24
n4
2.7025078130937E+32
n5
3.4650435530501E+40
2 √n
11323.244102288
3 √n
504.25155541977
4 √n
106.41073302204
5 √n
41.839679386046
1 , 7 , 131 , 223 , 627 , 917 , 1561 , 4389 , 29213 , 82137 , 139821 , 204491 , 574959 , 978747 , 18316551 , 128215857
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128215856
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128215857 can be divided by 16 positive divisors.
The sum of these divisors (counting 128215857) is 1, the average is 0.0625.
Base
System
Value
2
Binary
111101001000110101100110001
3
Ternary
22221021001002110
4
Quaternary
13221012230301
5
Quinary
230310401412
6
Senary
20420035533
8
Octal
751065461
10
Decimal
128215857
12
Duodecimal
36b32ba9
16
Hexadecimal
7a46b31
20
Vigesimal
2016jch
36
Base36
24c3zl
md5
f8fa5e2de1c70d2d7609d393139d5b86
sha1
056968090b6ecbe210627d91c9dae2c80a0d0021
sha256
7c6c500f7be8cc6b019968729cc8103487a7ef2c3d5ac7c11b88a31810ccb8c1
sha512
96a588177faa183bf66f55f0fcc0b16e405c848e5f836f6c23f050435712f4e4e536fda05baaf113d33f251d4e674207a27ad2367f63a42066777d46e982e674
ripemd-160
1b6c0462a7a5a3f3d5d5024fb56bad43aec174c1
Diameter
256431714
Circumference
805603988.84984
Area
5.16456029165E+16
Volume
8.8290469842944E+24
Surface area
2.06582411666E+17
Circumference
805603988.84984
Perimeter
512863428
Area
16439305986244449
Diagonal
181324603.88069
Surface area
98635835917466694
Volume
2.1077797055116E+24
Space diagonal
222076378.65999
Perimeter
384647571
Area
7.1184283023366E+15
Altitude
111038189.32999
Surface area
7.1184283023366E+15
Volume
2.4840422050243E+23
Height
60441534.626896