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'''224''' ('''two hundred twenty-four''') is the natural number following ] and preceding ]. ]'''224''' ('''two hundred twenty-four''') is the natural number following ] and preceding ].
{{Infobox number {{Infobox number
| number = 224 | number = 224
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224 is a ],<ref>{{Cite OEIS|A005153|name=Practical numbers}}</ref> 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>

\
224 is the smallest ''k'' with λ(''k'') = 24.<ref>{{Cite OEIS|A141162|name=Smallest k such that lambda(k) = n}}</ref> 224 is the smallest ''k'' with λ(''k'') = 24, where λ(''k'') is the ].<ref>{{Cite OEIS|A141162|name=Smallest k such that lambda(k) = n}}</ref>


==In other fields== ==In other fields==

Revision as of 11:31, 23 June 2018

Carmichael function224 (two hundred twenty-four) is the natural number following 223 and preceding 225.

Natural number
← 223 224 225 →
← 220 221 222 223 224 225 226 227 228 229 → ← 0 100 200 300 400 500 600 700 800 900 →
Cardinaltwo hundred twenty-four
Ordinal224th
(two hundred twenty-fourth)
Factorization2 × 7
PrimeNo
Greek numeralΣΚΔ´
Roman numeralCCXXIV, ccxxiv
Binary111000002
Ternary220223
Senary10126
Octal3408
Duodecimal16812
HexadecimalE016

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.

In other fields

References

  1. Sloane, N. J. A. (ed.). "Sequence A005153 (Practical numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. 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.
  3. Sloane, N. J. A. (ed.). "Sequence A141162 (Smallest k such that lambda(k) = n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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