638389945 is an odd 9-digits composite number following 638389944
and preceding 638389946 . In scientific notation, it is written as 6.38389945 × 10^8.
The sum of its digits is 55. It has a total of 3 prime factors and 8 positive divisors.
There are 510367920 positive integers (up to 638389945) that are relatively prime to 638389945.
638389945 has 8 divisors, whose sum is 766584000
The reverse of 638389945 is 549983836
Previous prime number is 1511
Is Prime? no Number parity odd Number length 9 Sum of Digits 55 Digital Root 1
Name
six hundred thirty-eight million three hundred eighty-nine thousand nine hundred forty-five
Scientific notation
6.38389945 × 10^8
Engineering notation
6.38389945 × 10^6
Prime Factorization
5 × 1511 × 84499
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
3 Total number of prime factors
rad Radical
638389945 Product of the distinct prime numbers
The prime factorization of 638389945 is 5 × 1511 × 84499.
Since it has a total of 3 prime factors.
8 , 3 , 85 , 19 , 176 , 467 , 5524 , 1188 , 3012 , 47177 , 352883 , 69758 , 3725022 , 6277199 , 99022335 , 7410455 , 937989346 , 509932488 , 7616740355 , 2436659868
n×2
1276779890
n×3
1915169835
n×4
2553559780
n×5
3191949725
n÷2
319194972.5
n÷3
212796648.33333
n÷3
159597486.25
n÷5
127677989
n2
407541721877103025
n3
2.6017053741433E+26
n4
1.6609025507055E+35
n5
1.0603034879953E+44
2 √n25266.379736717
3 √n861.05061117633
4 √n158.95401768033
5 √n57.67893164685
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
-638389944 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 638389945 can be divided by 8 positive divisors.
The sum of these divisors (counting 638389945) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110000011010000111010111001
3
Ternary
1122111020120101001
4
Quaternary
212003100322321
5
Quinary
2301411434240
6
Senary
143202525001
8
Octal
4603207271
10
Decimal
638389945
12
Duodecimal
159966761
16
Hexadecimal
260d0eb9
20
Vigesimal
9j9ieh5
36
Base36
ak2wu1
md5
0656ad1d9c553f138ed89c6345330945
sha1
2ea9d57be43a1b89b9247af0808b5d3307b8e9ce
sha256
d3c3427202820d325f1a722c597202b432587e93a73c1c16c7e1f9b15ffd83fc
sha512
fd68d66381c9af9ae07331b116446554917326fd77d8f2d2c8de239c3235837c5596b1f1f88e89a10a2245e87aa1bfcb943f1119a991e1ac1ecf5fcb37006821
ripemd-160
d6c87034bbf241e1ffb9448a9a682f77e2536257
Diameter
1276779890
Circumference
4011122322.6752
Area
1.2803300794804E+18
Volume
1.0897997986952E+27
Surface area
5.1213203179218E+18
Circumference
4011122322.6752
Perimeter
2553559780
Area
407541721877103025
Diagonal
902819718.30161
Surface area
2445250331262618150
Volume
2.6017053741433E+26
Space diagonal
1105723819.7811
Perimeter
1915169835
Area
1.7647074212381E+17
Altitude
552861909.89055
Surface area
1.7647074212381E+17
Volume
3.0661391878437E+25
Height
300939906.10054