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!
72 is an abundant number.
67 is an abundant number.
abundant
No, 29 is not an abundant number.
abundant
350 is an abundant number.
945 is the first odd abundant number.
No, 73 is not an abundant number.
No - the word for the number 15 is spelled fifteen.
Yes, this is well known. All integral multiples of any perfect, or abundant number must be an abundant number.