Hecho general: 23428 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 23428 is an unremarkable number.
Trivia: 23428 is an uninteresting number.
Fecha histórica: February 21st is the day in 1965 that Malcolm X is assassinated at the Audubon Ballroom in New York City by members of the Nation of Islam.