General fact: 28714 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 28714 is an unremarkable number.
Trivia: 28714 is an unremarkable number.
Historical date: August 12th is the day in 1953 that the islands of Zakynthos and Kefalonia in Greece are severely damaged by an earthquake measuring 7.3 on the Richter scale.