Is 1978 a deficient number and what is its deficiency?

Is 1978 a deficient number?

Here we will explain and calculate if 1978 is a deficient number and its deficiency if applicable.

1978 is a deficient number if the sum of its proper divisors is less than 1978.

The sum of its proper divisors is calculated as follows: 1 + 2 + 23 + 43 + 46 + 86 + 989 = 1190.

1190 is less than 1978. Therefore, 1978 is a deficient number.

The deficiency of 1978 is 1978 minus the sum of its proper divisors. Thus, the deficiency of 1978 is 1978 - 1190 = 788

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