31397985 is an odd 8-digits composite number following 31397984
and preceding 31397986 . In scientific notation, it is written as 3.1397985 × 10^7.
The sum of its digits is 45. It has a total of 3 prime factors and 8 positive divisors.
There are 16745568 positive integers (up to 31397985) that are relatively prime to 31397985.
31397985 has 8 divisors, whose sum is 41864040
The reverse of 31397985 is 58979313
Previous prime number is 5
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 45
Digital Root 9
Name
thirty-one million three hundred ninety-seven thousand nine hundred eighty-five
Scientific notation
3.1397985 × 10^7
Engineering notation
3.1397985 × 10^6
Prime Factorization
9 × 5 × 697733
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
31397985
Product of the distinct prime numbers
The prime factorization of 31397985 is 9 × 5 × 697733.
Since it has a total of 3 prime factors.
6 , 3 , 83 , 51 , 957 , 111 , 6138 , 752 , 86264 , 84627 , 210075 , 253640 , 5882787 , 1897464 , 60428962 , 90386619 , 248473210 , 909182843 , 3856296504 , 7913966224
n×2
62795970
n×3
94193955
n×4
125591940
n×5
156989925
n÷2
15698992.5
n÷3
10465995
n÷3
7849496.25
n÷5
6279597
n2
985833462060225
n3
3.0953184254265E+22
n4
9.7186761491765E+29
n5
3.051468479517E+37
2 √n
5603.3904914792
3 √n
315.47667814512
4 √n
74.855797981714
5 √n
31.577689898277
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
-31397984
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 31397985 can be divided by 8 positive divisors.
The sum of these divisors (counting 31397985) is 1, the average is 0.125.
Base
System
Value
2
Binary
1110111110001100001100001
3
Ternary
2012002011221100
4
Quaternary
1313301201201
5
Quinary
31014213420
6
Senary
3040545013
8
Octal
167614141
10
Decimal
31397985
12
Duodecimal
a622169
16
Hexadecimal
1df1861
20
Vigesimal
9g4ej5
36
Base36
ioyu9
md5
57376c9dc1d76e0b2350a865a6675c29
sha1
e2a7e9c7c45d7bc9c6bdeb12adb700ccdfc9f47a
sha256
eca6905131ccb7039180db618ab2f30f77369189a7528ec57177ca2ea78cda9c
sha512
4dae2b0b8dd74526d1904c3952837003662f39dd51672ede3dae8585b5a9c6d6c0dbcb0c05043070f1941f9413b2c1e08e606376eb4cf281f138a7a4ece41738
ripemd-160
9dde9bc9f419b8d7ec460261e34799be7849b2b6
Diameter
62795970
Circumference
197279358.02705
Area
3.0970871620714E+15
Volume
1.2965639501121E+23
Surface area
1.2388348648286E+16
Circumference
197279358.02705
Perimeter
125591940
Area
985833462060225
Diagonal
44403456.218187
Surface area
5915000772361350
Volume
3.0953184254265E+22
Space diagonal
54382905.275285
Perimeter
94193955
Area
4.2687841102246E+14
Altitude
27191452.637643
Surface area
4.2687841102246E+14
Volume
3.6478677475846E+21
Height
14801152.072729