Answer:
Deficient
Explanation:
A deficient number is one whose proper divisors add up to a number less than the number itself.
Powers of 2
2^2=4
4 is divisible by 1 and 2
1+2=3
3 is less than 4
2^3=8
8 is divisible by 1, 2, and 4.
1+2+4=7
7 is less than 8.
And so on