260 (number)

This article is about the number. For the year, see 260 BC and AD 260. For the locomotive, see 2-6-0.

260(two hundred [and] sixty) is the natural number following 259 and preceding 261.

In mathematics

260 is:

• an abundant number ^[1]
• an Ulam number ^[2]
• in the Moser-de Bruijn sequence ^[3]
• the magic constant of the normal magic square of order 8 ^[4]

In other fields

Pre-Columbian Mesoamericans used 260-day calendars. ^[5]

References

1. Sloane, N. J. A. (ed.). "SequenceA005101(Abundant numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
2. Sloane, N. J. A. (ed.). "SequenceA002858(Ulam numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
3. Sloane, N. J. A. (ed.). "SequenceA000695(Moser-de Bruijn sequence)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
4. Sloane, N. J. A. (ed.). "SequenceA006003". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
5. Aldana, Gerardo. "Maya Calendar and Mesoamerican Astronomy". Encyclopedia of the History of Science. Carnegie Mellon University Libraries Publishing Service. Archived from the original on 31 May 2023. Retrieved 3 January 2025.