81489618 is an even 8-digits composite number following 81489617
and preceding 81489619 . In scientific notation, it is written as 8.1489618 × 10^7.
The sum of its digits is 45. It has a total of 5 prime factors and 32 positive divisors.
There are 23141376 positive integers (up to 81489618) that are relatively prime to 81489618.
81489618 has 32 divisors, whose sum is 166573056
The reverse of 81489618 is 81698418
Previous prime number is 193
Is Prime? no Number parity even Number length 8 Sum of Digits 45 Digital Root 9
Name
eighty-one million four hundred eighty-nine thousand six hundred eighteen
Scientific notation
8.1489618 × 10^7
Engineering notation
8.1489618 × 10^6
Prime Factorization
2 × 3 × 63 × 193 × 1117
Composite number
ω Distinct Factors
5 Total number of distinct prime factors
Ω Total Factors
5 Total number of prime factors
rad Radical
81489618 Product of the distinct prime numbers
The prime factorization of 81489618 is 2 × 3 × 63 × 193 × 1117.
Since it has a total of 5 prime factors.
1 , 6 , 5 , 43 , 135 , 83 , 5924 , 2660 , 17207 , 62284 , 705941 , 900024 , 549456 , 6170192 , 44374111 , 14669986 , 945288480 , 782848085 , 5797924927 , 664894455
n×2
162979236
n×3
244468854
n×4
325958472
n×5
407448090
n÷2
40744809
n÷3
27163206
n÷3
20372404.5
n÷5
16297923.6
n2
6640557841785924
n3
5.4113652183404E+23
n4
4.4097008450105E+31
n5
3.5934483735418E+39
2 √n9027.1600185219
3 √n433.54491219403
4 √n95.01136783839
5 √n38.213820245644
1 , 2 , 3 , 6 , 63 , 126 , 189 , 193 , 378 , 386 , 579 , 1117 , 1158 , 2234 , 3351 , 6702 , 12159 , 24318 , 36477 , 70371 , 72954 , 140742 , 211113 , 215581 , 422226 , 431162 , 646743 , 1293486 , 13581603 , 27163206 , 40744809 , 81489618
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
-81489617 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 81489618 can be divided by 32 positive divisors.
The sum of these divisors (counting 81489618) is 1, the average is 0.03125.
Base
System
Value
2
Binary
100110110110110111011010010
3
Ternary
12200100002202000
4
Quaternary
10312312323102
5
Quinary
131330131433
6
Senary
12030334430
8
Octal
466667322
10
Decimal
81489618
12
Duodecimal
2335a416
16
Hexadecimal
4db6ed2
20
Vigesimal
159640i
36
Base36
1cilsi
md5
66ccde8d2171987d98ae595eb77eeef5
sha1
58620f9c1d2ef1f3842865e21156772e91e87e99
sha256
296524fbbf09bd7a849b6731b331d835e26acc5ce8552f73e660766783ab081f
sha512
5e7fcfc8b8f23571e0e71ead76a0174a1341356b437cad0b1359115cc93acc43d13be32ab53332c9c375d4c0bffaa96e6592ff11e6a7a3fae309732547d2d093
ripemd-160
69ed641818ee4bdc975000bed75163e41307f46e
Diameter
162979236
Circumference
512014370.50528
Area
2.0861927731493E+16
Volume
2.2667073621106E+24
Surface area
8.3447710925971E+16
Circumference
512014370.50528
Perimeter
325958472
Area
6640557841785924
Diagonal
115243722.9682
Surface area
39843347050715544
Volume
5.4113652183404E+23
Space diagonal
141144158.66538
Perimeter
244468854
Area
2.8754458931433E+15
Altitude
70572079.33269
Surface area
2.8754458931433E+15
Volume
6.3773550689425E+22
Height
38414574.322734