Hecho matemático: 1798 is a value of n for which f(s(n)) = f(n).
Trivia: 1798 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: December 2nd is the day in 1917 that an armistice is signed between Russia and the Central Powers at Brest-Litovsk and peace talks leading to the Treaty of Brest-Litovsk began.