Fait mathématique: 4589 is the index of a Fibonacci number whose first 9 digits are the digits 1-9 rearranged.
Culture générale: 4589 is a boring number.
Date historique: July 24th is the day in 1935 that the dust bowl heat wave reaches its peak, sending temperatures to 109°F (44°C) in Chicago and 104°F (40°C) in Milwaukee, Wisconsin.