No, all prime numbers are deficient.
Yes, this is well known. All integral multiples of any perfect, or abundant number must be an abundant number.
25 is not an abundant number because the sum of its divisors is less than half of 25. The lowest odd abundant number is 945.
In number theory, an abundant number is a number for which the sum of its proper divisors is greater than the number itself.
Prime numbers are abundant, in fact there is an infinite about of prime numbers. There is just and infinitely greater amount of non-prime numbers.
No. All prime numbers are deficient.
All prime numbers are going to be deficient, because remember that a prime number's only factors are one and itself. To find if its deficient or abundant, you'd add up all of its factors, excluding itself. If its only other factor beside itself is one, that's obviously less than the number, and therefore it will be deficient.
60 is abundant.
If a number is not abundant it cannot be made abundant!
No, 29 is not an abundant number.
72 is an abundant number.
67 is an abundant number.
350 is an abundant number.