81307946 is an even 8-digits composite number following 81307945
and preceding 81307947 . In scientific notation, it is written as 8.1307946 × 10^7.
The sum of its digits is 38. It has a total of 3 prime factors and 8 positive divisors.
There are 40629600 positive integers (up to 81307946) that are relatively prime to 81307946.
81307946 has 8 divisors, whose sum is 122035044
The reverse of 81307946 is 64970318
Previous prime number is 1801
Is Prime? no
Number parity even
Number length 8
Sum of Digits 38
Digital Root 2
Name
eighty-one million three hundred seven thousand nine hundred forty-six
Scientific notation
8.1307946 × 10^7
Engineering notation
8.1307946 × 10^6
Prime Factorization
2 × 1801 × 22573
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
81307946
Product of the distinct prime numbers
The prime factorization of 81307946 is 2 × 1801 × 22573.
Since it has a total of 3 prime factors.
6 , 7 , 9 , 83 , 486 , 385 , 9292 , 7634 , 50722 , 80527 , 685846 , 239815 , 5925192 , 6155525 , 51855497 , 20057741 , 592400261 , 242397815 , 9162552863 , 2642680341
n×2
162615892
n×3
243923838
n×4
325231784
n×5
406539730
n÷2
40653973
n÷3
27102648.666667
n÷3
20326986.5
n÷5
16261589.2
n2
6610982082738916
n3
5.375253741903E+23
n4
4.3705084098295E+31
n5
3.5535706177896E+39
2 √n
9017.0918815325
3 √n
433.22249249237
4 √n
94.958369202154
5 √n
38.196766342284
8 divisors
τ
Total Divisors
8
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81307945
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.125
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
8
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81307946 can be divided by 8 positive divisors.
The sum of these divisors (counting 81307946) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110110001010100100101010
3
Ternary
12122222212112102
4
Quaternary
10312022210222
5
Quinary
131303323241
6
Senary
12022413402
8
Octal
466124452
10
Decimal
81307946
12
Duodecimal
23291262
16
Hexadecimal
4d8a92a
20
Vigesimal
15839h6
36
Base36
1cepm2
md5
f1c6eb13a6f544afe321a02a649c4f15
sha1
fbef24cf5bdc7ae331cb4a6873f2a74032a8141e
sha256
6d053a267aa6861bf2c1f74e8742a5587d46fc8af58e1006f13434e45f3b0f53
sha512
d18efd7f8d7acd6ecf1301e7dec41c50d1d84dd453998a9bc003a15fa9f905651dcd528a3701784048b0c9cad410ffcb723aebb16d21c806c1502f2668ec0d58
ripemd-160
e0f93a4c8d74680c08ddf870c88d986facf50dd1
Diameter
162615892
Circumference
510872891.66415
Area
2.0769012744146E+16
Volume
2.2515810222325E+24
Surface area
8.3076050976585E+16
Circumference
510872891.66415
Perimeter
325231784
Area
6610982082738916
Diagonal
114986799.9619
Surface area
39665892496433496
Volume
5.375253741903E+23
Space diagonal
140829493.53107
Perimeter
243923838
Area
2.8626392138078E+15
Altitude
70414746.765533
Surface area
2.8626392138078E+15
Volume
6.33479728583E+22
Height
38328933.320633