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): $40,585$