What is the estimate 3630?

Answer 1

The front end estimate is 4000. But estimating a single number, in isolation and without context, is a complete waste of time. It all comes down to the context of what needs to be done with the number.

If I had to add 3630 to 1 trillion, I would estimate it as 0.
If I had to add 3630 to 0.0000000001, I would use the number as given, or possibly the front end estimate. If I had to divide it by 36, I would estimate it as 3636, because 3636/36 = 101. If I had to divide it by 10, I would estimate it as 3630, because 3630/10 = 363.

Answer 2

To the nearest hundred, 3600