638961661 is an odd 9-digits composite number following 638961660
and preceding 638961662 . In scientific notation, it is written as 6.38961661 × 10^8.
The sum of its digits is 46. It has a total of 3 prime factors and 8 positive divisors.
There are 589412352 positive integers (up to 638961661) that are relatively prime to 638961661.
638961661 has 8 divisors, whose sum is 688577400
The reverse of 638961661 is 166169836
Previous prime number is 1553
Is Prime? no Number parity odd Number length 9 Sum of Digits 46 Digital Root 1
Name
six hundred thirty-eight million nine hundred sixty-one thousand six hundred sixty-one
Scientific notation
6.38961661 × 10^8
Engineering notation
6.38961661 × 10^6
Prime Factorization
13 × 1553 × 31649
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
3 Total number of prime factors
rad Radical
638961661 Product of the distinct prime numbers
The prime factorization of 638961661 is 13 × 1553 × 31649.
Since it has a total of 3 prime factors.
1 , 6 , 65 , 44 , 607 , 876 , 6957 , 730 , 89653 , 96283 , 504014 , 115550 , 7423714 , 1761812 , 57204515 , 34653538 , 78555524 , 473710741 , 4761239369 , 5323766428
n×2
1277923322
n×3
1916884983
n×4
2555846644
n×5
3194808305
n÷2
319480830.5
n÷3
212987220.33333
n÷3
159740415.25
n÷5
127792332.2
n2
408272004227878921
n3
2.6087015796124E+26
n4
1.6668602943625E+35
n5
1.0650598223408E+44
2 √n25277.690974454
3 √n861.30757508682
4 √n158.98959391877
5 √n57.689258927821
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
-638961660 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 638961661 can be divided by 8 positive divisors.
The sum of these divisors (counting 638961661) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110000101011100011111111101
3
Ternary
1122112022121121201
4
Quaternary
212011130133331
5
Quinary
2302033233121
6
Senary
143223055501
8
Octal
4605343775
10
Decimal
638961661
12
Duodecimal
159ba1591
16
Hexadecimal
2615c7fd
20
Vigesimal
9jda431
36
Base36
akf5z1
md5
eff8d1f37f42416b7b2217422031a230
sha1
5fa4a8d849e26c9a6b3f02bbebce23397de54afe
sha256
f3d004781536b0d95bfc38c8353257e0ed7b9afaf9437728535149199465d636
sha512
4fff03515d0b9ea1f294639e18357cbe11b3cd103e82a3538269de6d2fd1299f5b6ae5966a16322144e2f06d4af7afd43b0ad8fc5304fbc86440f4e463e59e70
ripemd-160
1ae1269479754b744d1790a6ea88f0e004992ca5
Diameter
1277923322
Circumference
4014714520.2463
Area
1.2826243291487E+18
Volume
1.0927303623891E+27
Surface area
5.1304973165947E+18
Circumference
4014714520.2463
Perimeter
2555846644
Area
408272004227878921
Diagonal
903628246.82264
Surface area
2449632025367273526
Volume
2.6087015796124E+26
Space diagonal
1106714060.9406
Perimeter
1916884983
Area
1.7678696365767E+17
Altitude
553357030.4703
Surface area
1.7678696365767E+17
Volume
3.07438429506E+25
Height
301209415.60755