88.31 Sum of the factorials of the digits of integers

@article{Gupta20048831SO,
  title={88.31 Sum of the factorials of the digits of integers},
  author={Shyam Sunder Gupta},
  journal={The Mathematical Gazette},
  year={2004},
  volume={88},
  pages={258 - 261}
}
  • S. Gupta
  • Published 1 July 2004
  • Mathematics
  • The Mathematical Gazette
1 Citations
88.32 SFD chains and factorion cycles
  • S. Abbott
  • Mathematics
    The Mathematical Gazette
  • 2004
Note that permuting the digits oiN leaves S„ unaffected. A factorion is a number, N, such that S (N) = N. The only factorions are 1, 2, 145 and 40585. In a generalisation analogous to amicable

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Partial table of contents: Too Many Threes Ladders to Heaven Infinity Machines Grid of the Gods To the Valley of the Sea Horses Infinite Chess The Loom of Creation Slides in Hell Alien Abduction
SHY AM SUNDER GUPTA Chief Bridge Engineer
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