Hecho general: 8736 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 8736 is the smallest number that appears in its factorial 10 times.
Trivia: 8736 is an uninteresting number.
Fecha histórica: December 1st is the day in 1913 that the Buenos Aires Subway, the first underground railway system in the southern hemisphere and in Latin America, begins operation.