639968987 is an odd 9-digits composite number following 639968986
and preceding 639968988 . In scientific notation, it is written as 6.39968987 × 10^8.
The sum of its digits is 65. It has a total of 2 prime factors and 4 positive divisors.
There are 548544840 positive integers (up to 639968987) that are relatively prime to 639968987.
639968987 has 4 divisors, whose sum is 731393136
The reverse of 639968987 is 789869936
Previous prime number is 7
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 65
Digital Root 2
Name
six hundred thirty-nine million nine hundred sixty-eight thousand nine hundred eighty-seven
Scientific notation
6.39968987 × 10^8
Engineering notation
6.39968987 × 10^6
Prime Factorization
7 × 91424141
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
639968987
Product of the distinct prime numbers
The prime factorization of 639968987 is 7 × 91424141.
Since it has a total of 2 prime factors.
5 , 4 , 53 , 34 , 198 , 628 , 5653 , 8521 , 8431 , 66382 , 317893 , 826183 , 4002421 , 6609409 , 34533347 , 70958446 , 916440227 , 643087283 , 7885454971 , 7238201181
n×2
1279937974
n×3
1919906961
n×4
2559875948
n×5
3199844935
n÷2
319984493.5
n÷3
213322995.66667
n÷3
159992246.75
n÷5
127993797.4
n2
409560304321806169
n3
2.6210589307224E+26
n4
1.6773964287617E+35
n5
1.073481693312E+44
2 √n
25297.60832569
3 √n
861.7599558956
4 √n
159.0522188644
5 √n
57.707436944795
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
-639968986
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 639968987 can be divided by 4 positive divisors.
The sum of these divisors (counting 639968987) is 1, the average is 0.25.
Base
System
Value
2
Binary
100110001001010010011011011011
3
Ternary
1122121012210102002
4
Quaternary
212021102123123
5
Quinary
2302313001422
6
Senary
143300431215
8
Octal
4611223333
10
Decimal
639968987
12
Duodecimal
15a3a850b
16
Hexadecimal
262526db
20
Vigesimal
9jjg297
36
Base36
al0r8b
md5
0c32a0ade95fc8702d2101d0f893e689
sha1
94df5f2e08aa214d811030429fa135080dab3117
sha256
82293c079253039f9eda35ba0df664a269c6ba2220292a1c723158761c1f3331
sha512
b0d75a4f917dfa2680245b4235a5cceab14a69586f9d1639a1f3791d4b96fc7c15359c3744b340967c1c55b47c4415cdf909f237dc31c68c45e85196b35b7c95
ripemd-160
58b78c68853d3fd693462cd67ba5f1ec45fd8e25
Diameter
1279937974
Circumference
4021043736.169
Area
1.2866716432594E+18
Volume
1.0979065975178E+27
Surface area
5.1466865730375E+18
Circumference
4021043736.169
Perimeter
2559875948
Area
409560304321806169
Diagonal
905052820.91357
Surface area
2457361825930837014
Volume
2.6210589307224E+26
Space diagonal
1108458800.7524
Perimeter
1919906961
Area
1.7734481396218E+17
Altitude
554229400.37619
Surface area
1.7734481396218E+17
Volume
3.0889475730056E+25
Height
301684273.63786