Is 644 a deficient number and what is its deficiency?

Is 644 a deficient number?

Here we will explain and calculate if 644 is a deficient number and its deficiency if applicable.

644 is a deficient number if the sum of its proper divisors is less than 644.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 7 + 14 + 23 + 28 + 46 + 92 + 161 + 322 = 700.

700 is not less than 644. Therefore, 644 is not a deficient number.

The deficiency of 644 is 644 minus the sum of its proper divisors. Thus, the deficiency of 644 is 644 - 700 = No Deficiency

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