Then comes 28..........the primes in the pf add up to 28...........................1828 is repeated twice..............1 + 8 + 2 + 8 = 19.........................




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"