40,585

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Number

$40 \, 585$ (forty thousand, five hundred and eighty-five) is:

$5 \times 8117$


The $4$th and last factorion base $10$ after $1$, $2$, $145$:
$40 \, 585 = 4! + 0! + 5! + 8! + 5!$


Also see


Historical Note

The fact that $40 \, 585$ is a factorion base $10$ was discovered as late as $1964$ by Leigh Janes.


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $145$
  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $40,585$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $145$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $40,585$
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