Is 400 a deficient number and what is its deficiency?

Is 400 a deficient number?

Here we will explain and calculate if 400 is a deficient number and its deficiency if applicable.

400 is a deficient number if the sum of its proper divisors is less than 400.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 5 + 8 + 10 + 16 + 20 + 25 + 40 + 50 + 80 + 100 + 200 = 561.

561 is not less than 400. Therefore, 400 is not a deficient number.

The deficiency of 400 is 400 minus the sum of its proper divisors. Thus, the deficiency of 400 is 400 - 561 = No Deficiency

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