128661821 is an odd 9-digits prime number following 128661820
and preceding 128661822 . In scientific notation, it is written as 1.28661821 × 10^8.
The sum of its digits is 35. It has a total of 1 prime factors and 2 positive divisors.
There are 128661820 positive integers (up to 128661821) that are relatively prime to 128661821.
128661821 has 2 divisors, whose sum is 128661822
The reverse of 128661821 is 128166821
Previous prime number is 1
Is Prime? yes Number parity odd Number length 9 Sum of Digits 35 Digital Root 8
Name
one hundred twenty-eight million six hundred sixty-one thousand eight hundred twenty-one
Scientific notation
1.28661821 × 10^8
Engineering notation
1.28661821 × 10^6
Prime Factorization
128661821
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
128661821 Product of the distinct prime numbers
The prime factorization of 128661821 is 128661821.
Since it has a total of 1 prime factors.
7 , 7 , 98 , 73 , 526 , 436 , 5581 , 3515 , 63501 , 373 , 522857 , 677015 , 6329426 , 3135598 , 4739926 , 7588931 , 38495874 , 421738747 , 791894604 , 4309069358
n×2
257323642
n×3
385985463
n×4
514647284
n×5
643309105
n÷2
64330910.5
n÷3
42887273.666667
n÷3
32165455.25
n÷5
25732364.2
n2
16553864183036041
n3
2.1298503103761E+24
n4
2.740304193904E+32
n5
3.5257252768163E+40
2 √n11342.919421384
3 √n504.83551287729
4 √n106.50314277703
5 √n41.868744565921
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
128661822 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
64330911 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
11342.919465464 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999844554 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 128661821 can be divided by 2 positive divisors.
The sum of these divisors (counting 128661821) is 128661822, the average is 64330911.
Base
System
Value
2
Binary
111101010110011100100111101
3
Ternary
22222002200211122
4
Quaternary
13222303210331
5
Quinary
230414134241
6
Senary
20433400325
8
Octal
752634475
10
Decimal
128661821
12
Duodecimal
371090a5
16
Hexadecimal
7ab393d
20
Vigesimal
2042eb1
36
Base36
24lo3h
md5
686dcbe60b17e98be18bae35cd388bff
sha1
7ba8a42ef50828360fceb8d2824650e5788df69b
sha256
64da52a732599176ace900223c162f21fcf77ef809eb701fd53df6b7cacf06b9
sha512
3af90e25c5e63b5b181d80cd6dd4848bc4f884d5adad5cd505a387f44c3d50c1915c7187197e99ccd7243984ede613b212cb48b829dc192d3a6cb4dae9c22260
ripemd-160
799d96bf65ca577f684a1126a4df38da1b110e6d
Diameter
257323642
Circumference
808406063.30217
Area
5.2005498105949E+16
Volume
8.9214961177646E+24
Surface area
2.080219924238E+17
Circumference
808406063.30217
Perimeter
514647284
Area
16553864183036041
Diagonal
181955292.21782
Surface area
99323185098216246
Volume
2.1298503103761E+24
Space diagonal
222848810.96633
Perimeter
385985463
Area
7.1680334566533E+15
Altitude
111424405.48317
Surface area
7.1680334566533E+15
Volume
2.5100526622987E+23
Height
60651764.072607