Fatto generale: 1848 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1848 is the smallest value of n for which _{2n}C_{n} is divisible by n^{2}.
Trivia: 1848 is an uninteresting number.
Data storica: January 21st is the day in 1958 that the last Fokker C.X in military service, the Finnish Air Force FK-111 target tower, crashes, killing the pilot and winch-operator.