Why does the census of [Bamidbar 1.20-43](https://www.sefaria.org/Numbers.1.21-43?lang=bi&aliyot=0) come to a sum of 603,550 when the total tribal count is 637,800?

There is a difference between the total tribal count (637,800) and the pasuk (verse) in [1:46](https://www.sefaria.org/Numbers.1.46?lang=bi&with=all&lang2=en) wherein it states the sum total of every tribal member is 603,550!

Why is there a difference?

Perhaps the answer rests with the pasuk [Ezra 2:59](https://www.sefaria.org/Ezra.2.59?lang=bi&with=all&lang2=en) or Vayiqrah (Leviticus) 24.10 in the fact that 34250 Jews could not establish their tribal lineage through their fathers' houses.