Fatto generale: 238 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 238 is the number of connected partial orders on 6 unlabeled elements.
Trivia: 238 is an uninteresting number.
Data storica: August 25th is the day in 1248 that the Dutch city of Ommen receives city rights and fortification rights from Otto III, the Archbishop of Utrecht.