Fatto matematico: 40622 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 40622 is an uninteresting number.
Data storica: March 21st is the day in 1965 that Martin Luther King, Jr. leads 3,200 people on the start of the third and finally successful civil rights march from Selma to Montgomery, Alabama.