. Look at this series: 544, 509, 474, 439, . . . What number should come next

By observing the given series, we can see that each number is decreasing by 35.

Starting with 544 and decreasing by 35, we get:
544 - 35 = 509
509 - 35 = 474
474 - 35 = 439

Therefore, the next number in the series would be:
439 - 35 = 404.

So, the number that should come next is 404.