The book of Numbers is less about counting than it is about the power and authority of God. The 'number' of people moving through a wilderness for 40 years being sustained by the power of God. He miraculously provided for about 2.5 million people, year after year, from food, manna and quail, and water. The enormity of such an undertaking should lead us to understand that God can provide for us if we trust Him completely and follow Him, even as they literally followed Him, though they often grumbled ungratefully.