248 (two hundred [and] forty-eight) is the natural number following 247 and preceding 249.

← 247 248 249 →
Cardinaltwo hundred forty-eight
Ordinal248th
(two hundred forty-eighth)
Factorization23 × 31
Greek numeralΣΜΗ´
Roman numeralCCXLVIII
Binary111110002
Ternary1000123
Senary10526
Octal3708
Duodecimal18812
HexadecimalF816

Additionally, 248 is:

  • a nontotient.
  • a refactorable number.
  • an untouchable number.[1]
  • palindromic in bases 13 (16113), 30 (8830), 61 (4461) and 123 (22123).
  • a Harshad number in bases 3, 4, 6, 7, 9, 11, 13 (and 18 other bases).
  • part of the 43-aliquot tree. The aliquot sequence starting at 248 is: 248, 232, 218, 112, 136, 134, 70, 74, 40, 50, 43, 1, 0.

The exceptional Lie group E8 has dimension 248.

References

  1. ↑ Sloane, N. J. A. (ed.). "Sequence A005114 (Untouchable numbers: impossible values for sum of aliquot parts of n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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