Hecho general: 4639 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 4639 is an uninteresting number.
Trivia: 4639 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: September 12th is the day in 1940 that an explosion at the Hercules Powder Company plant in Kenvil, New Jersey kills 51 people and injures over 200.