Fatto matematico: 2806 is the number of semigroups of order 6 with 2 idempotents.
Trivia: 2806 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: September 6th is the day in 1870 that Louisa Ann Swain of Laramie, Wyoming becomes the first woman in the United States to cast a vote legally after 1807.