Fatto matematico: 484 is a palindrome in base 3 and in base 10.
Trivia: 484 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 28th is the day in 1975 that General Cao Van Vien, chief of the South Vietnamese military, departs for the US as the North Vietnamese Army closed in on victory.