General fact: 528 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 528 is an uninteresting number.
Trivia: 528 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: June 11th is the day in 1775 that the American Revolutionary War's first naval engagement, the Battle of Machias, results in the capture of a small British naval vessel.