In a unique counting game, three friends - Finn, Gus, and Harry - take turns. Finn says the first number ($1$), then Gus says the next two numbers ($2,3$), then Harry says the next three numbers ($4,5,6$). The pattern continues such that the person whose turn it is says $k$ numbers, where $k$ is the total number of turns that have occurred so far (including the current one). For example, Finn's first turn is turn 1, he says 1 number. Gus's first turn is turn 2, he says 2 numbers. Harry's first turn is turn 3, he says 3 numbers. Finn's second turn is turn 4, he says 4 numbers, and so on. What is the $500$th number said by Gus?