Fatto generale: 28871 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 28871 is a boring number.
Trivia: 28871 is an uninteresting number.
Data storica: January 16th is the day in 1900 that the United States Senate accepts the Anglo-German treaty of 1899 in which the United Kingdom renounces its claims to the Samoan islands.