244 (număr)

Pentru anul 244 al erei noastre, vedeți 244.
← 243 244 245 →
Cardinaldouă sute patruzeci și patru
Ordinal244-lea
două sute patruzeci și patrulea
Factorizare22· 61
Divizori1, 2, 4, 61, 122, 244
Cifre romaneCCXLIV
Binar111101002
Ternar1000013
Cuaternar33104
Cvinariu14345
Senar10446
Octal3648
Duodecimal18412
HexazecimalF416
VigesimalC420
Baza 366S36
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244 (două sute patruzeci și patru) este numărul natural care urmează după 243 și precede pe 245 într-un șir crescător de numere naturale.

În matematică

244:

  • Este un număr par.
  • Este un număr compus.[1]
  • Este un număr deficient.[2][3]
  • Este un număr nontotient.[4][5]
  • Este un număr 42-gonal.[6]
  • Este suma a două numere pozitive la puterea a 5-a.[7] ()
  • Este al doilea număr antiperfect, ceea ce înseamnă că inversarea cifrelor divizorilor proprii și adunarea acestora dă 244.[8] ()
  • Face parte din șirul 1, 2, 4, 8, 61, 221, 244, ... în care fiecare număr este format prin inversarea cifrelor dublului numărului anterior.[9]
  • Este un număr harshad în bazele 3, 9, 11, 61, 62, 81, 121, 122, 123, 184, 241 și 243.
  • Este un număr palindromic în bazele 3 (1000013), 11 (20211), 60 (4460), 121 (22121) și 243 (11243).

În știință

În astronomie

În alte domenii

244 se poate referi la:

Note

  1. ^ Coman, Enciclopedia…, p. 22
  2. ^ Coman, Enciclopedia…, p. 27
  3. ^ Șirul A005100 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  4. ^ Coman, Enciclopedia…, p. 54
  5. ^ Șirul A005277 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  6. ^ Coman, Enciclopedia…, p. 64
  7. ^ Șirul A020896 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  8. ^ Șirul A072228 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  9. ^ Șirul A036447 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)

Bibliografie

  • Marius Coman, Enciclopedia matematică a claselor de numere întregi, Columbus, Ohio: Education Publishing, 2013, ISBN: 978-1-59973-237-4

Legături externe

Materiale media legate de 244 la Wikimedia Commons

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