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A153425
Numbers n such that n = p*phi(p) where p is product of the digits of n.
0
1, 2, 128, 2612736
OFFSET
1,2
COMMENTS
No other terms < 10^59. - Chai Wah Wu, Dec 06 2015
EXAMPLE
2612736 = (2*6*1*2*7*3*6)*phi(2*6*1*2*7*3*6), so 2612736 is in the sequence.
CROSSREFS
Sequence in context: A012524 A012670 A209248 * A296060 A090121 A003369
KEYWORD
base,more,nonn
AUTHOR
Farideh Firoozbakht, Dec 26 2008
STATUS
approved