E is not far from pi..................pi is just on the other side of 3...........................0.4 decimal places.......................tens decimals............................4.............................decimal places..........from 2.7...........until u get to 3.1............................

e (Euler's Number)

The number e is a famous irrational number, and is one of the most important numbers in mathematics.
The first few digits are:

2.7182818284590452353602874713527 (and more ...)

It is often called Euler's number after Leonhard Euler.
And Euler is spoken like "Oiler".