Reading a painfully biased
Wikipedia article (these numbers were at least sourced):
- Egypt's population was about 3.0-3.5 million.
- Of this, about 2.0-2.5 million where Israelites.
Thus, about 1.0 - 1.5 million Egyptians.
- The Bible records 600,000 men as being part of the Israelite exodus.
That is roughly a 1:4 ratio to the Israelite population. Using a poor assumption that population ratios were similar for Egyptians, that could mean 250,000-300,000 Egyptian men, many of whom would've had a son since the ratio allows for 2 kids.