Fatto generale: 2938 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2938 is the number of binary rooted trees with 17 vertices.
Trivia: 2938 is an uninteresting number.
Data storica: January 16th is the day in 1707 that the Scottish Parliament ratifies the Act of Union, paving the way for the creation of Great Britain.