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| 224 is a |
224 is a ],<ref>{{Cite OEIS|A005153|name=Practical numbers}}</ref> | ||
| and a sum of two positive cubes {{nowrap|2<sup>3</sup> + 6<sup>3</sup>}}.<ref>{{Cite OEIS|A003325|Numbers that are the sum of 2 positive cubes}}</ref> | and a sum of two positive cubes {{nowrap|2<sup>3</sup> + 6<sup>3</sup>}}.<ref>{{Cite OEIS|A003325|Numbers that are the sum of 2 positive cubes}}</ref> | ||
Revision as of 05:53, 10 December 2022
224 (two hundred twenty-four) is the natural number following 223 and preceding 225.
In mathematics
Natural number
| ||||
|---|---|---|---|---|
| ← 220 221 222 223 224 225 226 227 228 229 → ← 0 100 200 300 400 500 600 700 800 900 → | ||||
| Cardinal | two hundred twenty-four | |||
| Ordinal | 224th (two hundred twenty-fourth) | |||
| Factorization | 2 × 7 | |||
| Prime | No | |||
| Greek numeral | ΣΚΔ´ | |||
| Roman numeral | CCXXIV | |||
| Binary | 111000002 | |||
| Ternary | 220223 | |||
| Senary | 10126 | |||
| Octal | 3408 | |||
| Duodecimal | 16812 | |||
| Hexadecimal | E016 | |||
224 is a practical number, and a sum of two positive cubes 2 + 6.
224 is the smallest k with λ(k) = 24, where λ(k) is the Carmichael function.
The mathematician and philosopher Alex Bellos suggested in 2014 that a candidate for the lowest uninteresting number would be 224 because it was, at the time, "the lowest number not to have its own page on Misplaced Pages".
See also
References
- Sloane, N. J. A. (ed.). "Sequence A005153 (Practical numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A003325 (Numbers that are the sum of 2 positive cubes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A141162 (Smallest k such that lambda(k) = n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Bellos, Alex (June 2014). The Grapes of Math: How Life Reflects Numbers and Numbers Reflect Life. illus. The Surreal McCoy (1st Simon & Schuster hardcover ed.). N.Y.: Simon & Schuster. pp. 238 & 319 (quoting p. 319). ISBN 978-1-4516-4009-0.
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