668238921 is an odd 9-digits composite number following 668238920
and preceding 668238922 . In scientific notation, it is written as 6.68238921 × 10^8.
The sum of its digits is 45. It has a total of 2 prime factors and 4 positive divisors.
There are 381850560 positive integers (up to 668238921) that are relatively prime to 668238921.
668238921 has 4 divisors, whose sum is 669754644
The reverse of 668238921 is 129832866
Previous prime number is 441
Is Prime? no Number parity odd Number length 9 Sum of Digits 45 Digital Root 9
Name
six hundred sixty-eight million two hundred thirty-eight thousand nine hundred twenty-one
Scientific notation
6.68238921 × 10^8
Engineering notation
6.68238921 × 10^6
Prime Factorization
441 × 1515281
Composite number
ω Distinct Factors
2 Total number of distinct prime factors
Ω Total Factors
2 Total number of prime factors
rad Radical
668238921 Product of the distinct prime numbers
The prime factorization of 668238921 is 441 × 1515281.
Since it has a total of 2 prime factors.
3 , 1 , 24 , 43 , 422 , 990 , 8917 , 2313 , 71529 , 49812 , 948339 , 395222 , 8933285 , 933987 , 2363613 , 21759185 , 895062839 , 619028327 , 1284479021 , 2109472460
n×2
1336477842
n×3
2004716763
n×4
2672955684
n×5
3341194605
n÷2
334119460.5
n÷3
222746307
n÷3
167059730.25
n÷5
133647784.2
n2
446543255539244241
n3
2.9839758326137E+26
n4
1.9940087906759E+35
n5
1.3324742827458E+44
2 √n25850.317618938
3 √n874.26667090897
4 √n160.78033965301
5 √n58.208492698378
4 divisors
τ Total Divisors
4 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-668238920 Sum of the proper positive divisors of n
A Arithmetic Mean
0.25 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
4 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 668238921 can be divided by 4 positive divisors.
The sum of these divisors (counting 668238921) is 1, the average is 0.25.
Base
System
Value
2
Binary
100111110101001000010001001001
3
Ternary
1201120102001110200
4
Quaternary
213311020101021
5
Quinary
2332032121141
6
Senary
150150402413
8
Octal
4765102111
10
Decimal
668238921
12
Duodecimal
167960409
16
Hexadecimal
27d48449
20
Vigesimal
a8g9h61
36
Base36
b1uog9
md5
643474fb6865641db25fb1e243662acf
sha1
77a562edd5d739e9d5546fd68f536903e4ea81f1
sha256
5c44c2e63d9ea5b017fe57befdc5eeea70a32b9d2aa8e2c44edd7e199c7783e8
sha512
98d252e2a8a9ff87df75b57266caf8011c8d28d49eff32c0aef4cbbf9364ce1e3b6196f0a1ee3abf76a8b3811e1857849a8819b5359240d383c45c2105214836
ripemd-160
ab1b884a199d3672709837187a0df10e9f347beb
Diameter
1336477842
Circumference
4198668970.1127
Area
1.4028570111122E+18
Volume
1.2499248738972E+27
Surface area
5.6114280444486E+18
Circumference
4198668970.1127
Perimeter
2672955684
Area
446543255539244241
Diagonal
945032544.98376
Surface area
2679259533235465446
Volume
2.9839758326137E+26
Space diagonal
1157423762.767
Perimeter
2004716763
Area
1.933589015928E+17
Altitude
578711881.3835
Surface area
1.933589015928E+17
Volume
3.5166492435632E+25
Height
315010848.32792