What is the estimate for 2864?

Answer 1

The front end estimate is 3000. 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 2864 to 1 trillion, I would estimate it as 0.
If I had to add 2864 to 0.0000000001, I would use the number as given, or possibly the front end estimate. If I had to divide it by 28, I would estimate it as 2856, because 2864/28 = 102. If I had to divide it by 10, I would estimate it as 2860, because 2860/10 = 286.

Answer 2

To the nearest hundred, 2900