poor little guy!
For the aspirin, I would use a baby aspirin or a 81mg one. Not a full regular aspirin which is 325mg.
I would clean it with normal saline, or perhaps warm water before I applied anything else.
Superglue just may work, but don't get it on it's nose, and try to keep it from inhaling the fumes. Maybe hold a dry cotton ball over the nose when you do it?? I'm not sure. I know the fumes hurt MY lungs, so imagine what it would feel like to him!!
I would give him a mash for feed for awhile. Just soak the regular starter feed with a bit of water or milk to make a crumble so it would be easier for him to eat it.
Maybe separate him if you notice ANY of the other chicks paying attention to his beak or trying to peak it.
Good luck with the little fella!! It will grow out like a finger nail I would assume.