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 1986 that a low-pressure system that redeveloped off the New South Wales coast dumps a record 328 millimeters (13 inches) of rain in a day on Sydney.