420 (number)

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419 420 421
Cardinal four hundred twenty
Ordinal 420th
(four hundred twentieth)
Factorization 22 × 3 × 5 × 7
Greek numeral ΥΚ´
Roman numeral CDXX, cdxx
Binary 1101001002
Ternary 1201203
Senary 15406
Octal 6448
Duodecimal 2B012
Hexadecimal 1A416

420 (four hundred [and] twenty) is the natural number following 419 and preceding 421.

Contents

In mathematics

420 is:

In other fields

References

  1. Sloane, N. J. A. (ed.). "SequenceA028442(Numbers n such that Mertens' function is zero)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  2. Sloane, N. J. A. (ed.). "SequenceA036913(Sparsely totient numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  3. Sloane, N. J. A. (ed.). "SequenceA002378(Oblong (or promic, pronic, or heteromecic) numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  4. "A003418 - OEIS". oeis.org. Retrieved 2024-11-20.
  5. Sloane, N. J. A. (ed.). "SequenceA020492(Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203))". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  6. Sloane, N. J. A. (ed.). "SequenceA067128(Ramanujan's largely composite numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.