It is not. See for yourself: It's proper factors are 1, 3, and 5, for a total of 9 < 15; it is deficient. QED.
60 is abundant.
If a number is not abundant it cannot be made abundant!
abundant
67 is an abundant number.
72 is an abundant number.
abundant
No, 29 is not an abundant number.
350 is an abundant number.
No - the word for the number 15 is spelled fifteen.
945 is the first odd abundant number.
No, 73 is not an abundant number.
No. The number fifteen can be an adjective (used with a noun) or a noun if it is just a number (e.g. "You have to count to fifteen"). It can be used as a pronoun ("Twenty people were injured and fifteen of those were hospitalized").