Is 390 a deficient number and what is its deficiency?

Is 390 a deficient number?

Here we will explain and calculate if 390 is a deficient number and its deficiency if applicable.

390 is a deficient number if the sum of its proper divisors is less than 390.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 5 + 6 + 10 + 13 + 15 + 26 + 30 + 39 + 65 + 78 + 130 + 195 = 618.

618 is not less than 390. Therefore, 390 is not a deficient number.

The deficiency of 390 is 390 minus the sum of its proper divisors. Thus, the deficiency of 390 is 390 - 618 = No Deficiency

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