General fact: 9984 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 9984 is the maximum number of regions space can be divided into by 32 spheres.
Trivia: 9984 is an uninteresting number.
Historical date: May 2nd is the day in 1998 that the European Central Bank is founded in Brussels in order to define and execute the European Union's monetary policy.