Mathematical fact: 4188 is a value of n for which s(n-1) = s(n+1).
Trivia: 4188 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: June 19th is the day in 1978 that Garfield, holder of the Guinness World Record for the world's most widely syndicated comic strip, makes its debut.