There are four 3-digit natural numbers, each of them equals the sum of the
cube of its digits, three of them are:
153=1+125+27
370=27+343+0
407=64+0+343
What is the 4th one?
Since the second one has a 0 on the end,
and since 1 is 13, just add 1
to both sides of it and get
371=27+343+1
Edwin