81128974 is an even 8-digits composite number following 81128973
and preceding 81128975 . In scientific notation, it is written as 8.1128974 × 10^7.
The sum of its digits is 40. It has a total of 5 prime factors and 24 positive divisors.
There are 38200032 positive integers (up to 81128974) that are relatively prime to 81128974.
81128974 has 24 divisors, whose sum is 129204720
The reverse of 81128974 is 47982118
Previous prime number is 313
Is Prime? no Number parity even Number length 8 Sum of Digits 40 Digital Root 4
Name
eighty-one million one hundred twenty-eight thousand nine hundred seventy-four
Scientific notation
8.1128974 × 10^7
Engineering notation
8.1128974 × 10^6
Prime Factorization
2 × 19 × 19 × 313 × 359
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
4269946 Product of the distinct prime numbers
The prime factorization of 81128974 is 2 × 19 × 19 × 313 × 359.
Since it has a total of 5 prime factors.
9 , 4 , 82 , 89 , 114 , 705 , 2008 , 9289 , 2579 , 89772 , 666438 , 926194 , 5316518 , 9260680 , 97764171 , 98786235 , 130573969 , 686139785 , 766765047 , 8036866129
n×2
162257948
n×3
243386922
n×4
324515896
n×5
405644870
n÷2
40564487
n÷3
27042991.333333
n÷3
20282243.5
n÷5
16225794.8
n2
6581910422292676
n3
5.3398363952051E+23
n4
4.3321544807085E+31
n5
3.5146324822938E+39
2 √n9007.1623722458
3 √n432.90439461783
4 √n94.906071313935
5 √n38.179936059498
1 , 2 , 19 , 38 , 313 , 359 , 361 , 626 , 718 , 722 , 5947 , 6821 , 11894 , 13642 , 112367 , 112993 , 129599 , 224734 , 225986 , 259198 , 2134973 , 4269946 , 40564487 , 81128974
24 divisors
τ Total Divisors
24 Total number of the positive divisors of n
σ Sum of Divisors
1 Sum of all the positive divisors of n
s Aliquot Sum
-81128973 Sum of the proper positive divisors of n
A Arithmetic Mean
0.041666666666667 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
24 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81128974 can be divided by 24 positive divisors.
The sum of these divisors (counting 81128974) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
100110101011110111000001110
3
Ternary
12122122210000211
4
Quaternary
10311132320032
5
Quinary
131232111344
6
Senary
12014513034
8
Octal
465367016
10
Decimal
81128974
12
Duodecimal
2320577a
16
Hexadecimal
4d5ee0e
20
Vigesimal
157128e
36
Base36
1cavim
md5
67a9747894246a8a4a15980d452f135a
sha1
d49c6945105db299ef43d719081e3d62a070c4ea
sha256
3576f05b58cfe24d9a15af0b2daa4ebadd00b87815a1df56cca7be666262fd9d
sha512
09cdfa86e25cdd54375f3cb2e9be4a079fb8daf864114188c60ee8906d0b9c8c61feed3c82c72ea222ab6837eb1d8b0b82711113a9e15ab64ef4a89818d90879
ripemd-160
da825cb0852525beded9f32a3da776277294b150
Diameter
162257948
Circumference
509748377.42335
Area
2.0677681429261E+16
Volume
2.2367454387397E+24
Surface area
8.2710725717043E+16
Circumference
509748377.42335
Perimeter
324515896
Area
6581910422292676
Diagonal
114733695.33221
Surface area
39491462533756056
Volume
5.3398363952051E+23
Space diagonal
140519504.93393
Perimeter
243386922
Area
2.8500508155695E+15
Altitude
70259752.466967
Surface area
2.8500508155695E+15
Volume
6.2930575424604E+22
Height
38244565.110738