Hecho general: 4392 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 4392 is a value of n for which n and 4n together use each digit 1-9 exactly once.
Trivia: 4392 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: January 9th is the day in 1861 that Mississippi becomes the second state to secede from the Union before the outbreak of the American Civil War.