According to the Bible, in Exodus 12:37:
And the people of Israel journeyed from Rameses to Succoth, about six hundred thousand men on foot, besides women and children.
Some Scholars believe that the total number of Israelites who left Egypt during the exodus, women and children and old men included, was around 2.4 million people. If we include ...
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As to how many people followed Moses from Egypt, I have a few thoughts:
1. Archaeology- there is no definitive answer to this question via Archaeological studies.
2. Biblical- Exodus 32:28, a short time after leaving Egypt and after camping at Mt. Sinai, God judged the people who worshipped the golden calf and it says ...