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It's actually an oblate spheroid. It's surface is an approximate ellipsoid, though.

well, as long as we're being nitpicky, you want "its surface" (the surface belonging to it), not "it's surface" (it is surface).

You're right. I can't believe I missed that. The error was the phone's, but I didn't catch it.

I double checked all the apostrophes this time.

But I’ll bet the Earth is closer to a sphere than this thing.

Yes, its oblateness is on the order of 40 miles difference between diameter at the poles and the equator. Not very oblate, but no perfect sphere.