28931681 is an odd 8-digits prime number following 28931680
and preceding 28931682 . In scientific notation, it is written as 2.8931681 × 10^7.
The sum of its digits is 38. It has a total of 1 prime factors and 2 positive divisors.
There are 28931680 positive integers (up to 28931681) that are relatively prime to 28931681.
28931681 has 2 divisors, whose sum is 28931682
The reverse of 28931681 is 18613982
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 38 Digital Root 2
Name
twenty-eight million nine hundred thirty-one thousand six hundred eighty-one
Scientific notation
2.8931681 × 10^7
Engineering notation
2.8931681 × 10^6
Prime Factorization
28931681
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
28931681 Product of the distinct prime numbers
The prime factorization of 28931681 is 28931681.
Since it has a total of 1 prime factors.
8 , 5 , 55 , 27 , 148 , 669 , 6392 , 7879 , 10969 , 40110 , 180484 , 756706 , 6147184 , 6270373 , 78729080 , 90515548 , 705591624 , 288377868 , 8388557909 , 2576010886
n×2
57863362
n×3
86795043
n×4
115726724
n×5
144658405
n÷2
14465840.5
n÷3
9643893.6666667
n÷3
7232920.25
n÷5
5786336.2
n2
837042165485761
n3
2.4217036915383E+22
n4
7.0063958680109E+29
n5
2.0270681021301E+37
2 √n5378.8178069163
3 √n306.99023123892
4 √n73.340424098285
5 √n31.065241459606
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
28931682 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
14465841 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
5378.8178998735 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999308716 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 28931681 can be divided by 2 positive divisors.
The sum of these divisors (counting 28931681) is 28931682, the average is 14465841.
Base
System
Value
2
Binary
1101110010111011001100001
3
Ternary
2000102212210202
4
Quaternary
1232113121201
5
Quinary
24401303211
6
Senary
2512034545
8
Octal
156273141
10
Decimal
28931681
12
Duodecimal
9832a55
16
Hexadecimal
1b97661
20
Vigesimal
90g941
36
Base36
h83tt
md5
b2e0443f97c27bbe2409d7646eee9773
sha1
50d8c70faff3cc28217d5d4f2ce6b11ae721f697
sha256
87f5130eb2d06def1f18ebac135a477fea6b95876d4b3198bdd8d9d1142c8cff
sha512
8c90ab128f04cc86a68bb446f587333d9a486cc88e7d093bb195d033c37aa019f010e4b1b909f549a193adf55d8f6c2ef1f93177b23b075e1ffe95da4cd92d89
ripemd-160
296b77f2e05b060c31346cedf100c635f0f82529
Diameter
57863362
Circumference
181783112.97121
Area
2.629645517835E+15
Volume
1.0144008702011E+23
Surface area
1.051858207134E+16
Circumference
181783112.97121
Perimeter
115726724
Area
837042165485761
Diagonal
40915575.652452
Surface area
5022252992914566
Volume
2.4217036915383E+22
Space diagonal
50111141.440375
Perimeter
86795043
Area
3.624498896747E+14
Altitude
25055570.720188
Surface area
3.624498896747E+14
Volume
2.8540051705187E+21
Height
13638525.217484