28156721 is an odd 8-digits prime number following 28156720
and preceding 28156722 . In scientific notation, it is written as 2.8156721 × 10^7.
The sum of its digits is 32. It has a total of 1 prime factors and 2 positive divisors.
There are 28156720 positive integers (up to 28156721) that are relatively prime to 28156721.
28156721 has 2 divisors, whose sum is 28156722
The reverse of 28156721 is 12765182
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 32 Digital Root 5
Name
twenty-eight million one hundred fifty-six thousand seven hundred twenty-one
Scientific notation
2.8156721 × 10^7
Engineering notation
2.8156721 × 10^6
Prime Factorization
28156721
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
28156721 Product of the distinct prime numbers
The prime factorization of 28156721 is 28156721.
Since it has a total of 1 prime factors.
3 , 7 , 57 , 35 , 623 , 657 , 3014 , 882 , 55754 , 21287 , 156845 , 280132 , 6720536 , 1397349 , 90388751 , 87714973 , 481077310 , 904553368 , 2145339993 , 3910971403
n×2
56313442
n×3
84470163
n×4
112626884
n×5
140783605
n÷2
14078360.5
n÷3
9385573.6666667
n÷3
7039180.25
n÷5
5631344.2
n2
792800937471841
n3
2.2322674804933E+22
n4
6.2853332645623E+29
n5
1.769743751223E+37
2 √n5306.2907006684
3 √n304.224387803
4 √n72.844290789796
5 √n30.897007301914
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
28156722 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
14078361 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
5306.2907948962 Returns the nth root of the product of n divisors
H Harmonic Mean
1.999999928969 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 28156721 can be divided by 2 positive divisors.
The sum of these divisors (counting 28156721) is 28156722, the average is 14078361.
Base
System
Value
2
Binary
1101011011010001100110001
3
Ternary
1221222111202112
4
Quaternary
1223122030301
5
Quinary
24202003341
6
Senary
2443255105
8
Octal
153321461
10
Decimal
28156721
12
Duodecimal
951a495
16
Hexadecimal
1ada331
20
Vigesimal
8fjbg1
36
Base36
grhv5
md5
0b4bb8a7aedfbb1efe6937c36b2198ec
sha1
126b21f9af05cdacab46e0577b49032d8cf3e17d
sha256
020735fc38b49b7043277b27c802fd90dd763cce05985f39657355658c196fa5
sha512
7d1e313f208113df35748dc2a629cefbf788615152466723f8b979b57637c6680f24865bed171d9b98b71765b22041fda1fec49f3dff21c2dc962916158e8c45
ripemd-160
10967feb60cec799c3cb06fcb3d8df232683d9bc
Diameter
56313442
Circumference
176913895.68555
Area
2.4906576009206E+15
Volume
9.3505001567536E+22
Surface area
9.9626304036825E+15
Circumference
176913895.68555
Perimeter
112626884
Area
792800937471841
Diagonal
39819616.710155
Surface area
4756805624831046
Volume
2.2322674804933E+22
Space diagonal
48768871.346542
Perimeter
84470163
Area
3.4329287599737E+14
Altitude
24384435.673271
Surface area
3.4329287599737E+14
Volume
2.6307524547984E+21
Height
13273205.570052