Number of Israel - Numbers 1

Numbers 1:46 "Even all they that were numbered were six hundred thousand and three thousand and five hundred and fifty."

These were only the able bodied men who were 20 and up and able to go to war. v45

There is also the Levites who were not to be numbered, their job was the tabernacle.

Able to go to war: 603,550
Under 20: ?
Elders ?
Children(less 20) ?
Women ?
Levites ?

Total Unknown

If it averaged out that each man of war had a wife the number would double and there would be well over a million people. It would have been a number that would have attracted the attention of the surrounding inhabitants.

v52 "And the children of Israel shall pitch their tents, everyman by his own camp, and every man by his own standard, throughout their hosts."

v53 "But the Levites shall pitch round about the tabernacle of testimony, that there be no wrath upon the congregation of the children of Israel: and the Levites shall keep the charge of the Tabernacle of testimony.

Psalm 3:3 "But thou, O Lord, art a shield for me; my glory, and the lifter up of mine head."