Fatto generale: 5390 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5390 is the number of ways to 7-color the faces of a cube.
Trivia: 5390 is an uninteresting number.
Data storica: October 3rd is the day in 1863 that the last Thursday in November is declared as Thanksgiving Day by President Abraham Lincoln as are Thursdays, November 30, 1865 and November 29, 1866.