642938861 is an odd 9-digits composite number following 642938860
and preceding 642938862 . In scientific notation, it is written as 6.42938861 × 10^8.
The sum of its digits is 47. It has a total of 3 prime factors and 8 positive divisors.
There are 603868608 positive integers (up to 642938861) that are relatively prime to 642938861.
642938861 has 8 divisors, whose sum is 682165440
The reverse of 642938861 is 168839246
Previous prime number is 487
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 47
Digital Root 2
Name
six hundred forty-two million nine hundred thirty-eight thousand eight hundred sixty-one
Scientific notation
6.42938861 × 10^8
Engineering notation
6.42938861 × 10^6
Prime Factorization
17 × 487 × 77659
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
642938861
Product of the distinct prime numbers
The prime factorization of 642938861 is 17 × 487 × 77659.
Since it has a total of 3 prime factors.
9 , 2 , 14 , 40 , 811 , 57 , 3482 , 9268 , 31456 , 19405 , 971371 , 964850 , 4402829 , 2909230 , 66993599 , 65313671 , 855806646 , 892446499 , 4732040634 , 7285406806
n×2
1285877722
n×3
1928816583
n×4
2571755444
n×5
3214694305
n÷2
321469430.5
n÷3
214312953.66667
n÷3
160734715.25
n÷5
128587772.2
n2
413370378983977321
n3
2.657718806351E+26
n4
1.7087507022136E+35
n5
1.0986222302141E+44
2 √n
25356.239094156
3 √n
863.09094210733
4 √n
159.23642514876
5 √n
57.760897837393
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
-642938860
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 642938861 can be divided by 8 positive divisors.
The sum of these divisors (counting 642938861) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110010100100111011111101101
3
Ternary
1122210210200022102
4
Quaternary
212110213133231
5
Quinary
2304043020421
6
Senary
143444224445
8
Octal
4624473755
10
Decimal
642938861
12
Duodecimal
15b39b125
16
Hexadecimal
265277ed
20
Vigesimal
a0i7731
36
Base36
amsest
md5
fa1465707e3f70ea83cf5fe182d67923
sha1
875aff35bf978edc89de5f281670827b7c18c707
sha256
662bf0f6f140170d05a9b617a633a9cb12a9b8169ad0b2312764c6f84a478b98
sha512
5d5a147be64a975623e20f561eb2544637731d2cf7b5b2cbe2fe54ae80404deea1c7bce59af84765c6f13e3d6521333f142a0c149900794d3951fd92d5965cf1
ripemd-160
b93321f93db20b97c5ab3f881dd52f5efc6b501c
Diameter
1285877722
Circumference
4039704004.85
Area
1.2986413458277E+18
Volume
1.113262650312E+27
Surface area
5.1945653833108E+18
Circumference
4039704004.85
Perimeter
2571755444
Area
413370378983977321
Diagonal
909252857.00291
Surface area
2480222273903863926
Volume
2.657718806351E+26
Space diagonal
1113602773.4125
Perimeter
1928816583
Area
1.7899462468606E+17
Altitude
556801386.70623
Surface area
1.7899462468606E+17
Volume
3.132151650763E+25
Height
303084285.66764