In this task you will be given a list of numbers. You should remove any number that is not an integer (whole number). If every number is not an whole number then an empty list ("[]") should be returned. Otherwise, answer with the list of whole numbers separated by comma inside brackets.
[56, 37, 23.926, -36.408, -14.061, 26.978, 39.517, -40.595, -43.687]