Is 1390 a deficient number and what is its deficiency?

Is 1390 a deficient number?

Here we will explain and calculate if 1390 is a deficient number and its deficiency if applicable.

1390 is a deficient number if the sum of its proper divisors is less than 1390.

The sum of its proper divisors is calculated as follows: 1 + 2 + 5 + 10 + 139 + 278 + 695 = 1130.

1130 is less than 1390. Therefore, 1390 is a deficient number.

The deficiency of 1390 is 1390 minus the sum of its proper divisors. Thus, the deficiency of 1390 is 1390 - 1130 = 260

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