Twenty-eight or 28 may refer to:
*
28 (number)
28 (twenty-eight) is the natural number following 27 and preceding 29.
In mathematics
It is a composite number, its proper divisors being 1, 2, 4, 7, and 14.
Twenty-eight is the second perfect number - it is the sum of its proper diviso ...
, the natural number following 27 and preceding 29
* one of the years
28 BC
__NOTOC__
Year 28 BC was either a common year starting on Saturday, Sunday or Monday or a leap year starting on Saturday or Sunday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further ...
,
AD 28,
1928
Events January
* January – British bacteriologist Frederick Griffith reports the results of Griffith's experiment, indirectly proving the existence of DNA.
* January 1 – Eastern Bloc emigration and defection: Boris Bazhanov, J ...
,
2028
Predicted and scheduled events
* January 1 – Books, films, and other works published in 1932 will enter the public domain in the United States.
* January 12 – Partial lunar eclipse.
* January 26 – Small annular solar eclip ...
*
''28'' (album), a 2005 electronic music album by Aoki Takamasa and Tujiko Noriko
*
''28'' (book), a 2007 non-fiction book by Stephanie Nolen
*
''28'' (2014 film), a Sri Lankan feature drama
*
''28'' (2019 film), an Indian Malayalam-language film
*
Twenty-eight (card game), an Indian trick-taking game for four players
* Twenty-eight, a nickname for the subspecies (''Barnardius zonarius semitorquatus'') of the
Australian ringneck
* "Twenty Eight", a song by Karma to Burn from the album ''
Wild, Wonderful Purgatory'', 1999
*
Toyota-28, a boat made by Toyota and Yanmar
* "28", a song by Agust D from ''
D-2'' mixtape
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