81691844 is an even 8-digits composite number following 81691843
and preceding 81691845 . In scientific notation, it is written as 8.1691844 × 10^7.
The sum of its digits is 41. It has a total of 5 prime factors and 24 positive divisors.
There are 36783360 positive integers (up to 81691844) that are relatively prime to 81691844.
81691844 has 24 divisors, whose sum is 157716888
The reverse of 81691844 is 44819618
Previous prime number is 41
Is Prime? no Number parity even Number length 8 Sum of Digits 41 Digital Root 5
Name
eighty-one million six hundred ninety-one thousand eight hundred forty-four
Scientific notation
8.1691844 × 10^7
Engineering notation
8.1691844 × 10^6
Prime Factorization
2 × 2 × 13 × 41 × 38317
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
40845922 Product of the distinct prime numbers
The prime factorization of 81691844 is 2 × 2 × 13 × 41 × 38317.
Since it has a total of 5 prime factors.
6 , 7 , 17 , 76 , 350 , 25 , 3334 , 4266 , 60283 , 45890 , 192998 , 986674 , 1807113 , 4683329 , 51118034 , 42001496 , 250379312 , 377511994 , 6711302592 , 3364943153
n×2
163383688
n×3
245075532
n×4
326767376
n×5
408459220
n÷2
40845922
n÷3
27230614.666667
n÷3
20422961
n÷5
16338368.8
n2
6673557376120336
n3
5.4517520809507E+23
n4
4.453636805237E+31
n5
3.6382580312608E+39
2 √n9038.3540536981
3 √n433.90324671124
4 √n95.070258512839
5 √n38.232767857871
1 , 2 , 4 , 13 , 26 , 41 , 52 , 82 , 164 , 533 , 1066 , 2132 , 38317 , 76634 , 153268 , 498121 , 996242 , 1570997 , 1992484 , 3141994 , 6283988 , 20422961 , 40845922 , 81691844
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
-81691843 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 81691844 can be divided by 24 positive divisors.
The sum of these divisors (counting 81691844) is 1, the average is 0.041666666666667.
Base
System
Value
2
Binary
100110111101000010011000100
3
Ternary
12200201101010212
4
Quaternary
10313220103010
5
Quinary
131403114334
6
Senary
12034534552
8
Octal
467502304
10
Decimal
81691844
12
Duodecimal
23437458
16
Hexadecimal
4de84c4
20
Vigesimal
15ab9c4
36
Base36
1cmxtw
md5
d7b5844356dfe330eec5e3fcc38d43d8
sha1
34c6eacf2c6c83f1485542436b57347439dce977
sha256
794a01be1a1694db33927adb7e5493b46155fc0004dd73cd7f7895e3c6301808
sha512
12c4260ac4f0caa499b096166b0f5399fd76aaef9c83daea162347eb6196b9227ca848a26e32fc7e5d7b76f79900e9b14c65e52e1668652aa71843b20e36dd40
ripemd-160
2c3a3536c2c45198355f4619044d23a5f7ece961
Diameter
163383688
Circumference
513284993.93721
Area
2.096559882613E+16
Volume
2.283624571561E+24
Surface area
8.3862395304518E+16
Circumference
513284993.93721
Perimeter
326767376
Area
6673557376120336
Diagonal
115529713.72007
Surface area
40041344256722016
Volume
5.4517520809507E+23
Space diagonal
141494424.37199
Perimeter
245075532
Area
2.8897351106666E+15
Altitude
70747212.185995
Surface area
2.8897351106666E+15
Volume
6.4249514429802E+22
Height
38509904.573356