3600/Historical Note

Historical Note on $3600$ (Three Thousand, Six Hundred)
There are $3600$ seconds of time in an hour.

There are $3600$ seconds of arc in an degree.

There are $3600$ minutes of arc in a $60$ degree angle.

These divisions date back to the time of the Babylonians, who used a $60$-based number system for their mathematics and astronomy.

Also see

 * Definition:Sexagesimal Notation