Read Numbers 2:32 Using Other Translations
These are those which were numbered of the children of Israel by the house of their fathers: all those that were numbered of the camps throughout their hosts were six hundred thousand and three thousand and five hundred and fifty.
These are the people of Israel as listed by their fathers' houses. All those listed in the camps by their companies were 603,550.
In summary, the troops of Israel listed by their families totaled 603,550.