Is 688 a deficient number and what is its deficiency?

Is 688 a deficient number?

Here we will explain and calculate if 688 is a deficient number and its deficiency if applicable.

688 is a deficient number if the sum of its proper divisors is less than 688.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 8 + 16 + 43 + 86 + 172 + 344 = 676.

676 is less than 688. Therefore, 688 is a deficient number.

The deficiency of 688 is 688 minus the sum of its proper divisors. Thus, the deficiency of 688 is 688 - 676 = 12

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