Been playing this for a while now so I think it's time to share some scores.
Both on Normal
Story - 923,230
Survival - 3,246,340 (Completed)
Useless statistic
Finished Survival with 3101 hearts and all stats updated. So take the minimum number of hearts needed to buy all upgrades and you get the number of zombies I killed in 31 days :P
...and I won't be going back to it - it took me 4 days of commutes and constant play to get to the end of Survival mode. So if you beat that - congratulations! :)