Question

How can u tell Whether 1080 is cube number

Answer 1

It's not though....? If you square root 1080 by three, you get a decimal number....

Answer 2

TSplit  into prime factors

1080  = 2*2*2*3*3*3*5

Its not a cube because  although there are  2 triplicates there is also a 5.

Note 2*2*2*3*3*3   is a cube.