128216391 is an odd 9-digits composite number following 128216390
and preceding 128216392 . In scientific notation, it is written as 1.28216391 × 10^8.
The sum of its digits is 33. It has a total of 3 prime factors and 8 positive divisors.
There are 85371840 positive integers (up to 128216391) that are relatively prime to 128216391.
128216391 has 8 divisors, whose sum is 171166704
The reverse of 128216391 is 193612821
Previous prime number is 821
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 33
Digital Root 6
Name
one hundred twenty-eight million two hundred sixteen thousand three hundred ninety-one
Scientific notation
1.28216391 × 10^8
Engineering notation
1.28216391 × 10^6
Prime Factorization
3 × 821 × 52057
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
128216391
Product of the distinct prime numbers
The prime factorization of 128216391 is 3 × 821 × 52057.
Since it has a total of 3 prime factors.
1 , 1 , 69 , 15 , 267 , 396 , 2608 , 2808 , 22617 , 35801 , 282097 , 306571 , 2525148 , 5304707 , 43331791 , 78205937 , 746373549 , 732318594 , 3148529672 , 3446359626
n×2
256432782
n×3
384649173
n×4
512865564
n×5
641081955
n÷2
64108195.5
n÷3
42738797
n÷3
32054097.75
n÷5
25643278.2
n2
16439442921064881
n3
2.1078060413894E+24
n4
2.7025528355495E+32
n5
3.4651157106097E+40
2 √n
11323.267682078
3 √n
504.25225546308
4 √n
106.41084381809
5 √n
41.839714237198
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-128216390
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128216391 can be divided by 8 positive divisors.
The sum of these divisors (counting 128216391) is 1, the average is 0.125.
Base
System
Value
2
Binary
111101001000110110101000111
3
Ternary
22221021001211020
4
Quaternary
13221012311013
5
Quinary
230310411031
6
Senary
20420042223
8
Octal
751066507
10
Decimal
128216391
12
Duodecimal
36b33373
16
Hexadecimal
7a46d47
20
Vigesimal
20170jb
36
Base36
24c4ef
md5
9637caf5f8be8328ccccb479b291d09a
sha1
c5cf3567922eb6f44295ba85cd70bdb559a1037f
sha256
30348e1b5dbb395cc0e54617a522d6c2cdc4ba7c5a528ef5e5c7dd495a29afbe
sha512
36064692b3ca32153dc0dac938b3c2544457743dde687304a34733163bc16734735b0dcac57c8ad02d15e3d2a74c041af1909a966fa52560102d1a136ec75d85
ripemd-160
077f3de0cc158206d682f6df0e87380563997784
Diameter
256432782
Circumference
805607344.07079
Area
5.1646033109926E+16
Volume
8.8291572997617E+24
Surface area
2.065841324397E+17
Circumference
805607344.07079
Perimeter
512865564
Area
16439442921064881
Diagonal
181325359.07073
Surface area
98636657526389286
Volume
2.1078060413894E+24
Space diagonal
222077303.57512
Perimeter
384649173
Area
7.1184875968532E+15
Altitude
111038651.78756
Surface area
7.1184875968532E+15
Volume
2.4840732421541E+23
Height
60441786.356911