Fait mathématique: 4048 is a value of n for which n, 2n, 3n, and 4n all use the same number of digits in Roman numerals.
Culture générale: 4048 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: January 30th is the day in 1956 that American civil rights leader Martin Luther King, Jr.'s home is bombed in retaliation for the Montgomery Bus Boycott.