There are references (I don't have them handy - please reference if you know) that say there are 600k letters in the Torah corresponding to all the Jews (at least in the desert) and that each Jew has a letter in the Torah.
Of course, everyone knows that there are really around 300k letters in the Torah so this reference to 600k letters is off by about a factor of 2.
While I'm sure this could just be allegorical - etc, I'm curious if there are references to "the other 300k letters"? Eg, if each letter you also included its atbash (just as a suggestion), there would be a little more than 600k.
Are there references about this discrepancy and any efforts to resolve it?