I was reading about the delta function -- an engineering function available
from the analysis toolpak -- in a book and wanted to try it on a worksheet.
However, after typing =delta in a cell, I pressed ENTER by mistake without
entering the arguments. Surprising, the number -178323444 appeared in the
cell. Seems that delta = -178323444 is some kind of constant. Anyone knows
what it is exactly?

I am using Excel 2003.