Hecho general: 74384 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 74384 is an unremarkable number.
Trivia: 74384 is an unremarkable number.
Fecha histórica: August 28th is the day in 1859 that a geomagnetic storm causes the Aurora Borealis to shine so brightly that it is seen clearly over parts of USA, Europe, and even as far away as Japan.