Fatto matematico: 5418 is a value of n for which n and 7n together use each digit 1-9 exactly once.
Trivia: 5418 is a boring number.
Data storica: October 31st is the day in 1963 that an explosion at the Indiana State Fair Coliseum (now Pepsi Coliseum) in Indianapolis kills 74 people during an ice skating show.