Is 690 a deficient number and what is its deficiency?

Is 690 a deficient number?

Here we will explain and calculate if 690 is a deficient number and its deficiency if applicable.

690 is a deficient number if the sum of its proper divisors is less than 690.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 5 + 6 + 10 + 15 + 23 + 30 + 46 + 69 + 115 + 138 + 230 + 345 = 1038.

1038 is not less than 690. Therefore, 690 is not a deficient number.

The deficiency of 690 is 690 minus the sum of its proper divisors. Thus, the deficiency of 690 is 690 - 1038 = No Deficiency

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