Fatto generale: 10439 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 10439 is an uninteresting number.
Trivia: 10439 is an uninteresting number.
Data storica: July 30th is the day in 1811 that Father Miguel Hidalgo y Costilla, leader of the Mexican insurgency, is executed by the Spanish in Chihuahua, Mexico.