Is 3990 a deficient number and what is its deficiency?

Is 3990 a deficient number?

Here we will explain and calculate if 3990 is a deficient number and its deficiency if applicable.

3990 is a deficient number if the sum of its proper divisors is less than 3990.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 5 + 6 + 7 + 10 + 14 + 15 + 19 + 21 + 30 + 35 + 38 + 42 + 57 + 70 + 95 + 105 + 114 + 133 + 190 + 210 + 266 + 285 + 399 + 570 + 665 + 798 + 1330 + 1995 = 7530.

7530 is not less than 3990. Therefore, 3990 is not a deficient number.

The deficiency of 3990 is 3990 minus the sum of its proper divisors. Thus, the deficiency of 3990 is 3990 - 7530 = No Deficiency

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