10000000 was a number.
In 2007, Elton Pope claimed the population of London to be ten million. (TV: Love & Monsters)
The First Doctor estimated that the 57th Segment of Time was ten million years after the first segment. (TV: The Ark)
As recalled by the Ninth Doctor, ten million Dalek ships were on fire as he wiped the entire race out at the end of the Last Great Time War. (TV: Dalek)