Fatto matematico: 2889 is a number n for which n^{2}+1 is 5 times another square.
Trivia: 2889 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 28th is the day in 1958 that Chad, the Republic of the Congo, and Gabon become autonomous republics within the French Community.