244 (number)
From Infogalactic: the planetary knowledge core
244 (two hundred [and] forty four) is the natural number following 243 and preceding 245.
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|---|---|---|---|---|
| Cardinal | two hundred forty-four | |||
| Ordinal | 244th (two hundred and forty-fourth) |
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| Factorization | 22× 61 | |||
| Prime | no | |||
| Roman numeral | CCXLIV | |||
| Binary | 111101002 | |||
| Ternary | 1000013 | |||
| Quaternary | 33104 | |||
| Quinary | 14345 | |||
| Senary | 10446 | |||
| Octal | 3648 | |||
| Duodecimal | 18412 | |||
| Hexadecimal | F416 | |||
| Vigesimal | C420 | |||
| Base 36 | 6S36 | |||
As 244 = 1 + 243 = 15 + 35, it is the sum of two nonzero fifth powers.[1]
It is the second anti-perfect number, meaning that reversing the digits of the proper divisors of 244 and adding the results gives 244 back again.[2] It is also part of the sequence 1, 2, 4, 8, 61, 221, 244, ... in which each number is formed by reversing the digits of the double of the previous number.[3]
It is considered a lucky number in several areas of the United Arab Emirates; specifically Dubai.
References
- ↑ "Sloane's A020896 : Positive numbers n such that n = x^5 + y^5 has a solution in nonzero integers x, y", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A072228 : Numbers n such that n = the sum of the reverses of the proper divisors of n", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A036447 : Double and reverse digits", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
