What is wrong with 3837

So, whenever I go to my status message and try to type in the string of numbers "3837", a message comes back saying that the status contains one or more offensive words. I originally found this when I went to do a "Road to ___" status message, something like: "Road to Leona: 3837/4800". What is offensive about the string "3837"? Does Riot have something to hide from us? Is it a secret plot to overthrow the world?![slayer-jinx-unamused] Probably not. But...