def digit_sum(n):
    return sum(int(x) for x in str(n))

j=100
k=1
res = []
while j<1000:
    k=1
    x = digit_sum(j)
    while j >= x**k:
        k+=1
    if j == x**k:
        res.append(j**k) 
    j+=1


print res
print digit_sum(512)