Bluebulb Projects' The Measure of Things presents:
3,500 is about four times the number of Population of Vatican City
In other words, it's 4.160 times the count of Population of Vatican City, and the count of Population of Vatican City is 0.240 times that amount.
(a.k.a. Vatican City State, a.k.a. Stato della Città del Vaticano
, a.k.a. Status Civitatis Vaticanae
) (Rome, Italy) (2014 estimates; permanent residents only)