Fatto generale: 408 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 408 is the 8^{th} Pell number.
Trivia: 408 is an uninteresting number.
Data storica: February 11th is the day in 1959 that the Federation of Arab Emirates of the South, which will later become South Yemen, is created as a protectorate of the United Kingdom.