If you are asking about the K2000 specificly then the touch is not like a piano and it doesn't have 88 keys.
You would need the k2500 88 keys or the k2600 88 keys for that.
No synth is going to be like a piano touch but some come very close !.
I'm not the keyboard guy ... but I have a K2500 and it doesn't have weighted keys ... so it's not like a piano. Some nice sounds on it though. My bro has an Alesis Q8 which is 88key and weighted and he likes very much. I prefer the piano sound from the Q8 over the K2500, but that could be partially due to how he plays it because of the weighted keys.