Fatto generale: 1864 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1864 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1864 is an uninteresting number.
Data storica: February 6th is the day in 1989 that the Round Table Talks start in Poland, thus marking the beginning of overthrow of communism in Eastern Europe.