2 sets of 4 numbers....................added together.............the number of single digits.............8 of them......like the square root of 8..............................surprising connections between numbers...

The 2 sets of 4 numbers...........being the "curious repetition of 1828"...............

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".