Which of the following numbers are squares of even numbers?
121, 225, 256, 324, 1296, 6561, 5476, 4489, 373758
Only even numbers be the square of even numbers
So, 256, 324, 1296, 5476, 373758 can be square of even numbers but 373758 is not a perfect square
So, 256, 324, 1296, 5476 are numbers