Hecho general: 870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 870 is the sum of its digits and the cube of its digits.
Trivia: 870 is an unremarkable number.
Fecha histórica: May 19th is the day in 1962 that a birthday salute to U.S. President John F. Kennedy takes place at Madison Square Garden, New York City.