72181868 is an even 8-digits composite number following 72181867
and preceding 72181869 . In scientific notation, it is written as 7.2181868 × 10^7.
The sum of its digits is 41. It has a total of 4 prime factors and 12 positive divisors.
There are 32809920 positive integers (up to 72181868) that are relatively prime to 72181868.
72181868 has 12 divisors, whose sum is 137801832
The reverse of 72181868 is 86818127
Previous prime number is 11
Is Prime? no
Number parity even
Number length 8
Sum of Digits 41
Digital Root 5
Name
seventy-two million one hundred eighty-one thousand eight hundred sixty-eight
Scientific notation
7.2181868 × 10^7
Engineering notation
7.2181868 × 10^6
Prime Factorization
2 × 2 × 11 × 1640497
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
36090934
Product of the distinct prime numbers
The prime factorization of 72181868 is 2 × 2 × 11 × 1640497.
Since it has a total of 4 prime factors.
9 , 6 , 5 , 79 , 280 , 519 , 4736 , 6539 , 67405 , 19525 , 700145 , 867900 , 938696 , 7459571 , 39409887 , 98761447 , 867930057 , 833272196 , 6044042032 , 1858019245
n×2
144363736
n×3
216545604
n×4
288727472
n×5
360909340
n÷2
36090934
n÷3
24060622.666667
n÷3
18045467
n÷5
14436373.6
n2
5210222067969424
n3
3.7608356156086E+23
n4
2.7146413997556E+31
n5
1.9594788718449E+39
2 √n
8495.9912900144
3 √n
416.36674850741
4 √n
92.173701726764
5 √n
37.298006766177
1 , 2 , 4 , 11 , 22 , 44 , 1640497 , 3280994 , 6561988 , 18045467 , 36090934 , 72181868
12 divisors
τ
Total Divisors
12
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-72181867
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.083333333333333
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
12
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 72181868 can be divided by 12 positive divisors.
The sum of these divisors (counting 72181868) is 1, the average is 0.083333333333333.
Base
System
Value
2
Binary
100010011010110100001101100
3
Ternary
12000211012220112
4
Quaternary
10103112201230
5
Quinary
121434304433
6
Senary
11055035152
8
Octal
423264154
10
Decimal
72181868
12
Duodecimal
2020bab8
16
Hexadecimal
44d686c
20
Vigesimal
12b2ed8
36
Base36
16z3vw
md5
992a5a9a4ec29858684c17666c540e25
sha1
baaca17412bec2d63f4a25b4c1031401d28f5fea
sha256
41b1c32c806052feea788604268f9600f92c45c875499b15ed5bb6431d4251e1
sha512
1e9e381010b950febffaa637157cc2bcdb70b44c7ed78e7fc0cc8d646e7284cc2115ff74af45bc0ef0ff0e6b101161513e03933413deb95fa627f1005b7e886a
ripemd-160
88081418d3b26303fabcac01fc4161ad4ca40e26
Diameter
144363736
Circumference
453532052.46238
Area
1.6368395372304E+16
Volume
1.5753351388473E+24
Surface area
6.5473581489217E+16
Circumference
453532052.46238
Perimeter
288727472
Area
5210222067969424
Diagonal
102080576.68302
Surface area
31261332407816544
Volume
3.7608356156086E+23
Space diagonal
125022662.76123
Perimeter
216545604
Area
2.2560923351099E+15
Altitude
62511331.380615
Surface area
2.2560923351099E+15
Volume
4.4321872778745E+22
Height
34026858.894342