128217820 is an even 9-digits composite number following 128217819
and preceding 128217821 . In scientific notation, it is written as 1.28217820 × 10^8.
The sum of its digits is 31. It has a total of 4 prime factors and 12 positive divisors.
There are 51287120 positive integers (up to 128217820) that are relatively prime to 128217820.
128217820 has 12 divisors, whose sum is 269257464
The reverse of 128217820 is 028712821
Previous prime number is 5
Is Prime? no
Number parity even
Number length 9
Sum of Digits 31
Digital Root 4
Name
one hundred twenty-eight million two hundred seventeen thousand eight hundred twenty
Scientific notation
1.28217820 × 10^8
Engineering notation
1.28217820 × 10^6
Prime Factorization
2 × 2 × 5 × 6410891
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
64108910
Product of the distinct prime numbers
The prime factorization of 128217820 is 2 × 2 × 5 × 6410891.
Since it has a total of 4 prime factors.
8 , 7 , 78 , 62 , 988 , 363 , 7418 , 1972 , 54766 , 37842 , 756233 , 178118 , 7482030 , 6664437 , 88817381 , 9809372 , 189329064 , 18509013 , 2549768522 , 3710090501
n×2
256435640
n×3
384653460
n×4
512871280
n×5
641089100
n÷2
64108910
n÷3
42739273.333333
n÷3
32054455
n÷5
25643564
n2
16439809365552400
n3
2.1078765180667E+24
n4
2.702673319757E+32
n5
3.4653088123141E+40
2 √n
11323.330782062
3 √n
504.25412879037
4 √n
106.41114030994
5 √n
41.839807499354
1 , 2 , 4 , 5 , 10 , 20 , 6410891 , 12821782 , 25643564 , 32054455 , 64108910 , 128217820
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
-128217819
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 128217820 can be divided by 12 positive divisors.
The sum of these divisors (counting 128217820) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
111101001000111001011011100
3
Ternary
22221021010210011
4
Quaternary
13221013023130
5
Quinary
230310432240
6
Senary
20420053004
8
Octal
751071334
10
Decimal
128217820
12
Duodecimal
36b34164
16
Hexadecimal
7a472dc
20
Vigesimal
20174b0
36
Base36
24c5i4
md5
a90acf3909632016a9e901d7b3c2372c
sha1
4daf6d065db0716965213840dd5705a3c7f7774f
sha256
20c858fffc4d1832cf3f240d6c954b738c1b63ea189b68f007d6a10ea7698547
sha512
cdc31cb214d5f129843b8d1d20ac8b9a626e0ebcf9a87b0a84880080f328d8ff37aeab692063e6327b61d8943dc122d475f188ece1cf03ce44ca486a4024ab10
ripemd-160
e2c44eea39daf7da326b669adeb6b30b14c88d78
Diameter
256435640
Circumference
805616322.7426
Area
5.1647184329236E+16
Volume
8.8294525117771E+24
Surface area
2.0658873731694E+17
Circumference
805616322.7426
Perimeter
512871280
Area
16439809365552400
Diagonal
181327379.98191
Surface area
98638856193314400
Volume
2.1078765180667E+24
Space diagonal
222079778.67572
Perimeter
384653460
Area
7.1186462719709E+15
Altitude
111039889.33786
Surface area
7.1186462719709E+15
Volume
2.4841562997148E+23
Height
60442459.993971