81121878 is an even 8-digits composite number following 81121877
and preceding 81121879 . In scientific notation, it is written as 8.1121878 × 10^7.
The sum of its digits is 36. It has a total of 5 prime factors and 32 positive divisors.
There are 26967168 positive integers (up to 81121878) that are relatively prime to 81121878.
81121878 has 32 divisors, whose sum is 180760800
The reverse of 81121878 is 87812118
Previous prime number is 409
Is Prime? no Number parity even Number length 8 Sum of Digits 36 Digital Root 9
Name
eighty-one million one hundred twenty-one thousand eight hundred seventy-eight
Scientific notation
8.1121878 × 10^7
Engineering notation
8.1121878 × 10^6
Prime Factorization
2 × 9 × 3 × 409 × 3673
Composite number
ω Distinct Factors
5 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
81121878 Product of the distinct prime numbers
The prime factorization of 81121878 is 2 × 9 × 3 × 409 × 3673.
Since it has a total of 5 prime factors.
9 , 3 , 82 , 24 , 151 , 535 , 1280 , 6372 , 28226 , 84097 , 112877 , 539584 , 19395 , 3632662 , 36275043 , 30005708 , 891051378 , 510148136 , 5840711140 , 3255408173
n×2
162243756
n×3
243365634
n×4
324487512
n×5
405609390
n÷2
40560939
n÷3
27040626
n÷3
20280469.5
n÷5
16224375.6
n2
6580759090246884
n3
5.338435360664E+23
n4
4.3306390203867E+31
n5
3.5130957027385E+39
2 √n9006.7684548899
3 √n432.89177282565
4 √n94.903995990105
5 √n38.179268149398
1 , 2 , 3 , 6 , 9 , 18 , 27 , 54 , 409 , 818 , 1227 , 2454 , 3673 , 3681 , 7346 , 7362 , 11019 , 11043 , 22038 , 22086 , 33057 , 66114 , 99171 , 198342 , 1502257 , 3004514 , 4506771 , 9013542 , 13520313 , 27040626 , 40560939 , 81121878
32 divisors
τ Total Divisors
32 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-81121877 Sum of the proper positive divisors of n
A Arithmetic Mean
0.03125 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
32 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81121878 can be divided by 32 positive divisors.
The sum of these divisors (counting 81121878) is 1, the average is 0.03125.
Base
System
Value
2
Binary
100110101011101001001010110
3
Ternary
12122122102022000
4
Quaternary
10311131021112
5
Quinary
131231400003
6
Senary
12014420130
8
Octal
465351126
10
Decimal
81121878
12
Duodecimal
23201646
16
Hexadecimal
4d5d256
20
Vigesimal
15704di
36
Base36
1caq1i
md5
e6eb4bb943077a9fc449c05bdee5bcd0
sha1
e71b65a75530db4689271643f7d6216c4bd24da0
sha256
5f5999e22203e71b8bb0efd3820f80ddb22b2dee2cc2c6ddb3b8185be87f6633
sha512
9f607c292fe123a08dac3cd6b193bdbd0d945f10601084ae2f252acf12146976f31d0c2bc3b4659077fbaddc6709e38b0b1da31d80b7c7e0f7e708dfe986e2e6
ripemd-160
db73f8e54e052b355916c026b9c2b825c5058fe8
Diameter
162243756
Circumference
509703791.94041
Area
2.0674064412964E+16
Volume
2.2361585747635E+24
Surface area
8.2696257651855E+16
Circumference
509703791.94041
Perimeter
324487512
Area
6580759090246884
Diagonal
114723660.07278
Surface area
39484554541481304
Volume
5.338435360664E+23
Space diagonal
140507214.3014
Perimeter
243365634
Area
2.8495522741696E+15
Altitude
70253607.150702
Surface area
2.8495522741696E+15
Volume
6.2914064074193E+22
Height
38241220.024259