81572394 is an even 8-digits composite number following 81572393
and preceding 81572395 . In scientific notation, it is written as 8.1572394 × 10^7.
The sum of its digits is 39. It has a total of 4 prime factors and 16 positive divisors.
There are 27173520 positive integers (up to 81572394) that are relatively prime to 81572394.
81572394 has 16 divisors, whose sum is 163248480
The reverse of 81572394 is 49327518
Previous prime number is 6571
Is Prime? no
Number parity even
Number length 8
Sum of Digits 39
Digital Root 3
Name
eighty-one million five hundred seventy-two thousand three hundred ninety-four
Scientific notation
8.1572394 × 10^7
Engineering notation
8.1572394 × 10^6
Prime Factorization
2 × 3 × 6571 × 2069
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
81572394
Product of the distinct prime numbers
The prime factorization of 81572394 is 2 × 3 × 6571 × 2069.
Since it has a total of 4 prime factors.
10 , 9 , 24 , 26 , 973 , 845 , 3220 , 8630 , 51219 , 65965 , 439812 , 664360 , 8921341 , 5890288 , 93105941 , 76923748 , 525538318 , 434071142 , 6978749657 , 7479754087
n×2
163144788
n×3
244717182
n×4
326289576
n×5
407861970
n÷2
40786197
n÷3
27190798
n÷3
20393098.5
n÷5
16314478.8
n2
6654055462891236
n3
5.4278723391682E+23
n4
4.4276454103233E+31
n5
3.6117363590318E+39
2 √n
9031.7436854685
3 √n
433.69165877835
4 √n
95.03548645358
5 √n
38.221580504672
1 , 2 , 3 , 6 , 2069 , 4138 , 6207 , 6571 , 12414 , 13142 , 19713 , 39426 , 13595399 , 27190798 , 40786197 , 81572394
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81572393
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81572394 can be divided by 16 positive divisors.
The sum of these divisors (counting 81572394) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100110111001011001000101010
3
Ternary
12200111022021210
4
Quaternary
10313023020222
5
Quinary
131340304034
6
Senary
12032213550
8
Octal
467131052
10
Decimal
81572394
12
Duodecimal
2339a2b6
16
Hexadecimal
4dcb22a
20
Vigesimal
159gaje
36
Base36
1ckdnu
md5
d6b97b43b471442f0f6e33b0fdeb968d
sha1
774b8503b896b21b40e7c639541fbb354ad523de
sha256
4c529f0c029ecf9d818d5f1fe3e2169a5c88effa3a056ca241501a65ed72c4d7
sha512
1f2a801bf65d27a37296c3209080d293d5c5eac739bdbd2f9c4c93308e5c378ff5eb83a2d048f0897988d3892756da35bf95df63a421a9f422d0beaf7238704c
ripemd-160
4a2b727b84e8566faaca5dbd56921fecbb17af44
Diameter
163144788
Circumference
512534467.45226
Area
2.0904331758798E+16
Volume
2.2736218487139E+24
Surface area
8.3617327035193E+16
Circumference
512534467.45226
Perimeter
326289576
Area
6654055462891236
Diagonal
115360785.91004
Surface area
39924332777347416
Volume
5.4278723391682E+23
Space diagonal
141287530.90303
Perimeter
244717182
Area
2.8812905345272E+15
Altitude
70643765.451513
Surface area
2.8812905345272E+15
Volume
6.3968088974012E+22
Height
38453595.303347