638664868 is an even 9-digits composite number following 638664867
and preceding 638664869 . In scientific notation, it is written as 6.38664868 × 10^8.
The sum of its digits is 55. It has a total of 4 prime factors and 12 positive divisors.
There are 318510752 positive integers (up to 638664868) that are relatively prime to 638664868.
638664868 has 12 divisors, whose sum is 1120539420
The reverse of 638664868 is 868466836
Previous prime number is 389
Is Prime? no Number parity even Number length 9 Sum of Digits 55 Digital Root 1
Name
six hundred thirty-eight million six hundred sixty-four thousand eight hundred sixty-eight
Scientific notation
6.38664868 × 10^8
Engineering notation
6.38664868 × 10^6
Prime Factorization
2 × 2 × 389 × 410453
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
319332434 Product of the distinct prime numbers
The prime factorization of 638664868 is 2 × 2 × 389 × 410453.
Since it has a total of 4 prime factors.
5 , 9 , 9 , 78 , 572 , 383 , 3882 , 5375 , 48453 , 39381 , 399502 , 767630 , 5960642 , 4455549 , 69013191 , 30418974 , 611815035 , 76851786 , 6390016100 , 6928277292
n×2
1277329736
n×3
1915994604
n×4
2554659472
n×5
3193324340
n÷2
319332434
n÷3
212888289.33333
n÷3
159666217
n÷5
127732973.6
n2
407892813617457424
n3
2.6050680996714E+26
n4
1.6637654740077E+35
n5
1.0625885568401E+44
2 √n25271.819641648
3 √n861.17419741886
4 √n158.97112832728
5 √n57.683898684372
1 , 2 , 4 , 389 , 778 , 1556 , 410453 , 820906 , 1641812 , 159666217 , 319332434 , 638664868
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
-638664867 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 638664868 can be divided by 12 positive divisors.
The sum of these divisors (counting 638664868) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
100110000100010100000010100100
3
Ternary
1122111202112111101
4
Quaternary
212010110002210
5
Quinary
2301444233433
6
Senary
143212445444
8
Octal
4604240244
10
Decimal
638664868
12
Duodecimal
159a79884
16
Hexadecimal
261140a4
20
Vigesimal
9jbd238
36
Base36
ak8sys
md5
b42c44c553aedc293629785f9fd98a20
sha1
f499a5f08f733112ec2bc97972f30189ed3a02ff
sha256
501310dabc9a036f2afa986a8f86bac475890564d045d04c4a378c1b39e274d2
sha512
81db4345679b88fb2ea42bb22e5a30328f7dfdaee1500b270e2b42e4dd50d5ef603b9d2e81271e158cc5f90240153d370b51949e532c704f98784504c889cd33
ripemd-160
e2d739b2d8279f5b62022d3ec9fb180a01ee9b6b
Diameter
1277329736
Circumference
4012849714.8294
Area
1.2814330667127E+18
Volume
1.0912083738705E+27
Surface area
5.1257322668507E+18
Circumference
4012849714.8294
Perimeter
2554659472
Area
407892813617457424
Diagonal
903208518.13682
Surface area
2447356881704744544
Volume
2.6050680996714E+26
Space diagonal
1106200000.3853
Perimeter
1915994604
Area
1.7662276930691E+17
Altitude
553100000.19264
Surface area
1.7662276930691E+17
Volume
3.070102197884E+25
Height
301069506.04561