General fact: 8860 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 8860 is the smallest number n so that n+3, n^{2}+3^{2}, n^{4}+3^{4}, and n^{8}+3^{8} are all prime.
Trivia: 8860 is an uninteresting number.
Historical date: April 3rd is the day in 1860 that the first successful United States Pony Express run from Saint Joseph, Missouri to Sacramento, California begins.