81497872 is an even 8-digits composite number following 81497871
and preceding 81497873 . In scientific notation, it is written as 8.1497872 × 10^7.
The sum of its digits is 46. It has a total of 6 prime factors and 20 positive divisors.
There are 40687488 positive integers (up to 81497872) that are relatively prime to 81497872.
81497872 has 20 divisors, whose sum is 158140300
The reverse of 81497872 is 27879418
Previous prime number is 733
Is Prime? no
Number parity even
Number length 8
Sum of Digits 46
Digital Root 1
Name
eighty-one million four hundred ninety-seven thousand eight hundred seventy-two
Scientific notation
8.1497872 × 10^7
Engineering notation
8.1497872 × 10^6
Prime Factorization
2 × 2 × 2 × 2 × 733 × 6949
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
6
Total number of prime factors
rad
Radical
10187234
Product of the distinct prime numbers
The prime factorization of 81497872 is 2 × 2 × 2 × 2 × 733 × 6949.
Since it has a total of 6 prime factors.
9 , 7 , 88 , 15 , 118 , 251 , 87 , 2451 , 42365 , 4103 , 777368 , 868853 , 3274454 , 1063366 , 80553 , 53514969 , 668452788 , 304458218 , 6144018721 , 5871768231
n×2
162995744
n×3
244493616
n×4
325991488
n×5
407489360
n÷2
40748936
n÷3
27165957.333333
n÷3
20374468
n÷5
16299574.4
n2
6641903140528384
n3
5.4130097198318E+23
n4
4.4114877328161E+31
n5
3.5952686257862E+39
2 √n
9027.6171828451
3 √n
433.55954947331
4 √n
95.013773648062
5 √n
38.214594342029
1 , 2 , 4 , 8 , 16 , 733 , 1466 , 2932 , 5864 , 6949 , 11728 , 13898 , 27796 , 55592 , 111184 , 5093617 , 10187234 , 20374468 , 40748936 , 81497872
20 divisors
τ
Total Divisors
20
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81497871
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.05
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
20
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81497872 can be divided by 20 positive divisors.
The sum of these divisors (counting 81497872) is 1, the average is 0.05.
Base
System
Value
2
Binary
100110110111000111100010000
3
Ternary
12200100112001201
4
Quaternary
10312320330100
5
Quinary
131330412442
6
Senary
12030440544
8
Octal
466707420
10
Decimal
81497872
12
Duodecimal
23363154
16
Hexadecimal
4db8f10
20
Vigesimal
15974dc
36
Base36
1cis5s
md5
9364f0b95cc6d6aa59d8b114dcdcc199
sha1
c5d909e48369be583688f2c7979a34c45cc17114
sha256
3b5dac41dbea595d9ea16c92c04a4fbc362b6d9bbbc2caa193fc5e28bac9e3a8
sha512
af912a61f31135362c186a6f29c90c9eedd5af62963b11dfe0575b38f5d485519870fe9f3a0aa1ad96a1502c8745bbaec750bef2df95d5a0ccfc8df0a71ff170
ripemd-160
26061391de2f60eb948047e31a5bd5844ac93999
Diameter
162995744
Circumference
512066231.9168
Area
2.0866154112139E+16
Volume
2.2673962092845E+24
Surface area
8.3464616448556E+16
Circumference
512066231.9168
Perimeter
325991488
Area
6641903140528384
Diagonal
115255395.88695
Surface area
39851418843170304
Volume
5.4130097198318E+23
Space diagonal
141158455.01274
Perimeter
244493616
Area
2.8760284245866E+15
Altitude
70579227.506372
Surface area
2.8760284245866E+15
Volume
6.3792931325363E+22
Height
38418465.295649