1) Zero, literally
Found on
https://www.crosswordclues.com/clue/round-number
A round number is mathematically defined as the product of a considerable number of comparatively small factors as compared to its neighbouring numbers, such as 24 = 2*2*2*3 (4 factors, as opposed to 3 factors for 27; 2 factors for 21, 22, 25, and 26; and 1 factor for 23). However, a round number is informally considered to be an integer that ends...
Found on
http://en.wikipedia.org/wiki/Round_number
No exact match found.
