Fatto generale: 4048 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4048 is a value of n for which n, 2n, 3n, and 4n all use the same number of digits in Roman numerals.
Trivia: 4048 is an uninteresting number.
Data storica: January 30th is the day in 1971 that Carole King's Tapestry album is released, it would become the longest charting album by a female solo artist and sell 24 million copies worldwide.