| Base 10 | 28 (2 digits) | ||
| Digit Sum: 10 | Digital Root: 1 | happy | |
| Base 2 | 0b11100 (5 digits) | ||
| Digit Sum: 0b11 | Digital Root: 0b1 | always happy | |
| Base 8 | 034 (2 digits) | ||
| Digit Sum: 07 | Digital Root: 07 | sad | |
| Base 16 | 0x1c (2 digits) | ||
| Digit Sum: 0xd | Digital Root: 0xd | sad | |
More about this number at Positiv Integers and Number Empire.
The number is not a prime.
Its 3 (2 unique) factors are:
22 = 4
7
Its 6 divisors are:
1
2
4
7
14
28
Its aliquote sum is:
28
makeing it a
perfect
number.
It is related to a Mersenne Prime: 7
| In HTML this number represents this color: |
⇧↑⇧↑⇧↑ #00001C ⇩↓⇩↓⇩↓ |
In the work of Johann Sebastian Bach BWV 28 is Gottlob! nun geht das Jahr zu Ende
The number appears at position 33 of the decimal digits of π surrounded by
793238462643383279502884197169399375105820 Source: The Pi-Search Page
Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 821.592ms; cpu: 78.4699999999994ms)