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From Wikipedia, the free encyclopedia

← 287  288  289 →
Cardinaltwo hundred eighty-eight
Ordinal288th
(two hundred eighty-eighth)
Factorization25 × 32
Greek numeralΣΠΗ´
Roman numeralCCLXXXVIII
Binary1001000002
Ternary1012003
Quaternary102004
Quinary21235
Senary12006
Octal4408
Duodecimal20012
Hexadecimal12016
VigesimalE820
Base 368036

288 is a pentagonal pyramidal number, is 4 superfactorial since 288 = 1!·2!·3!·4!

288 is an untouchable number, a Harshad number in base 10 and base 12, an Achilles number, a 3-smooth number and a self number.

Both 288 and 289 are powerful numbers.

288 is sum of the sequence of integers 1..4 to the second tetration (i.e. , where is the hyperoperation) since 288 = 1 + 4 + 27 + 256 = 11 + 22 + 33 + 44.

288 is the number of labelled pointed rooted trees (vertebrates) with up to 4 nodes, the number of maximal directed Pseudoforests on up to 4 vertices, the number of Endofunctions for all sets with ≤ 4 points, and is two dozen sets of a dozen, thus being two gross and being 200 in base 12, often told as a pun in maths classes.

This page was last edited on 23 December 2018, at 20:22
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