Problem 2491. Dudeney Numbers: Numbers which are the cube of their decimal sum
70.09% Correct | 29.91% Incorrect
Last Solution submitted on Dec 16, 2022
Alex Drikitis on 14 Sep 2021
is there any negative dudeney number?
Dyuman Joshi on 14 Sep 2021
Depends upon how you define them.
If you are taking - sign outside the cube of the sum, every negative number corresponding to the positive Dudeney number is a Dudeney number.
If you define by the way OP has defined, -1 qualifies as a Dudeney number.
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