What kind of CPU is this?

Hello,

I got this CPU out of an old computer and I'm not sure what it is. It looks exactly like the 486 to me. It had an aluminum heat sink attached to the top of it which i ripped off. On the heat sink it said Intel and had the years 89',93'. I can not get the things across the top of the ceramic off. The underside looks like a 486 but the top does not say it anywhere. Any help would be appreciated. I placed it next to a 486 for reference.