Fatto generale: 889 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 889 is a Kaprekar constant in base 2.
Trivia: 889 is a boring number.
Data storica: June 7th is the day in 2006 that Abu Musab al-Zarqawi, the leader of Al-Qaeda in Iraq, is killed in an airstrike by the United States Air Force.