28123721 is an odd 8-digits prime number following 28123720
and preceding 28123722 . In scientific notation, it is written as 2.8123721 × 10^7.
The sum of its digits is 26. It has a total of 1 prime factors and 2 positive divisors.
There are 28123720 positive integers (up to 28123721) that are relatively prime to 28123721.
28123721 has 2 divisors, whose sum is 28123722
The reverse of 28123721 is 12732182
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 26 Digital Root 8
Name
twenty-eight million one hundred twenty-three thousand seven hundred twenty-one
Scientific notation
2.8123721 × 10^7
Engineering notation
2.8123721 × 10^6
Prime Factorization
28123721
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
28123721 Product of the distinct prime numbers
The prime factorization of 28123721 is 28123721.
Since it has a total of 1 prime factors.
10 , 10 , 93 , 9 , 458 , 651 , 1096 , 6150 , 20878 , 6629 , 136764 , 860116 , 2939043 , 5718527 , 87511501 , 34063621 , 371716146 , 351740249 , 7499609623 , 7063655281
n×2
56247442
n×3
84371163
n×4
112494884
n×5
140618605
n÷2
14061860.5
n÷3
9374573.6666667
n÷3
7030930.25
n÷5
5624744.2
n2
790943682885841
n3
2.2244279464194E+22
n4
6.2559190949702E+29
n5
1.7593972322551E+37
2 √n5303.1802722517
3 √n304.10548985021
4 √n72.822937816678
5 √n30.889761574891
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
28123722 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
14061861 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
5303.1803665348 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999288857 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 28123721 can be divided by 2 positive divisors.
The sum of these divisors (counting 28123721) is 28123722, the average is 14061861.
Base
System
Value
2
Binary
1101011010010001001001001
3
Ternary
1221220211111022
4
Quaternary
1223102021021
5
Quinary
24144424341
6
Senary
2442442225
8
Octal
153221111
10
Decimal
28123721
12
Duodecimal
9503375
16
Hexadecimal
1ad2249
20
Vigesimal
8ff961
36
Base36
gqseh
md5
4a0839e5651c6c180ec63357996d34e2
sha1
87667d1094e4bf104b43ba38d4dec549e50fb6e4
sha256
2feff6a0d29c62c1e28f03ea99e85a2dbe69271d65c9c2a51cfa34b5c787e9b3
sha512
ab65a7d68581c06c10ede95ac308b8d6b4c9631a1a93877b87c7498d251e57428893ff65c29d9b0c0f7a91ffce4bffea2a2237a0420d4d39d6fa82ddc3288be5
ripemd-160
13e60a200086ed426eb05e629baa6f9dc7c92c92
Diameter
56247442
Circumference
176706550.57042
Area
2.4848228635574E+15
Volume
9.3176619932146E+22
Surface area
9.9392914542297E+15
Circumference
176706550.57042
Perimeter
112494884
Area
790943682885841
Diagonal
39772947.662597
Surface area
4745662097315046
Volume
2.2244279464194E+22
Space diagonal
48711713.669892
Perimeter
84371163
Area
3.4248866117098E+14
Altitude
24355856.834946
Surface area
3.4248866117098E+14
Volume
2.62151347529E+21
Height
13257649.220866