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260 (number)

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

← 259 260 261 →
Cardinaltwo hundred sixty
Ordinal260th
(two hundred sixtieth)
Factorization22 × 5 × 13
Greek numeralΣΞ´
Roman numeralCCLX
Binary1000001002
Ternary1001223
Senary11126
Octal4048
Duodecimal19812
Hexadecimal10416

It is also the magic constant of the n×n normal magic square and n-queens problem for n = 8, the size of an actual chess board.

260 is also the magic constant of the Franklin magic square devised by Benjamin Franklin.

52 61 4 13 20 29 36 45
14 3 62 51 46 35 30 19
53 60 5 12 21 28 37 44
11 6 59 54 43 38 27 22
55 58 7 10 23 26 39 42
9 8 57 56 41 40 25 24
50 63 2 15 18 31 34 47
16 1 64 49 48 33 32 17

The minor diagonal gives 260, and in addition a number of combinations of two half diagonals of four numbers from a corner to the center give 260.

There are 260 days in the Mayan sacred calendar Tzolkin.

260 may also refer to the years AD 260 and 260 BC.

References

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