So all the Israelites twenty years of age or older who could serve in Israel’s army were counted according to their families.
We have here the sum total at the foot of the account; they were in all 600,000 fighting men, and 3550 over. Some think that when this was their number some months before (Exo 38:26) the Levites were reckoned with them, but now that tribe was separated for the service of God, yet so many more had by this time attained to the age of...
Commenting on Numbers 1:44-46
So were all those that were numbered of the children of Israel,.... Of all the tribes, excepting Levi, that is, all the sums of the number of the children of Israel; all put together made the sum total given in the next verse: by the house of their fathers, from twenty years old and upward, all that were able to go forth to war in...
all they that were numbered were six hundred thousand, &c.--What an astonishing increase from seventy-five persons who went down to Egypt about two hundred fifteen years before [see on Gen 46:8], and who were subjected to the greatest privations and hardships! And yet this enumeration was restricted to men from twenty years and upwards [Num 1:3].