Mathematical fact: 1549 is the smallest multi-digit number that is not the sum of a prime and a non-trivial power.
Trivia: 1549 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: March 28th is the day in 1910 that Henri Fabre becomes the first person to fly a seaplane, the Fabre Hydravion, after taking off from a water runway near Martigues, France.