Fatto generale: 86814 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 86814 is an uninteresting number.
Trivia: 86814 is an uninteresting number.
Data storica: September 8th is the day in 1380 that Battle of Kulikovo – Russian forces defeat a mixed army of Tatars and Mongols, stopping their advance.