Hecho general: 1387 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 1387 is a boring number.
Trivia: 1387 is an uninteresting number.
Fecha histórica: October 18th is the day in 1860 that the Second Opium War finally ends at the Convention of Peking with the ratification of the Treaty of Tientsin, an unequal treaty.