Fatto matematico: 584 is the number of ways to color the vertices of a triangle with 12 colors, up to rotation.
Trivia: 584 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 6th is the day in 2008 that a military junta led by Mohamed Ould Abdel Aziz stages a coup d'état in Mauritania, overthrowing president Sidi Ould Cheikh Abdallahi.