Hecho general: 8464 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 8464 is the number of different products of subsets of the set {1, 2, 3, ... 17}.
Trivia: 8464 is a boring number.
Fecha histórica: March 4th is the day in 1985 that the Food and Drug Administration approves a blood test for AIDS, used since then for screening all blood donations in the United States.