Hecho general: 9870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 9870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: January 8th is the day in 1889 that Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.