Fatto generale: 4278 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4278 is an uninteresting number.
Trivia: 4278 is an unremarkable number.
Data storica: September 17th is the day in 1920 that the American Professional Football Association (later renamed National Football League) is organized in Canton, Ohio, United States.