Fatto generale: 1804 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1804 is the number of 3×3 sliding puzzle positions that require exactly 14 moves to solve starting with the hole on a side.
Trivia: 1804 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 8th is the day in 1972 that United Airlines Flight 553 crashes after aborting its landing attempt at Chicago Midway International Airport, killing 45.