3,628,800
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Number
$3 \, 628 \, 800$ (three million, six hundred and twenty-eight thousand, eight hundred ) is:
- $2^8 \times 3^4 \times 5^2 \times 7$
- The $10$th factorial after $1$, $2$, $6$, $24$, $120$, $720$, $5040$, $40 \, 320$, $362 \, 880$:
- $3 \, 628 \, 800 = 10! = 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1$
- Apart from the trivial $0!$, $1!$ and $2!$, the only factorial that is the product of $2$ consecutive factorials:
- $10! = 6! \times 7!$
Also see
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $3,628,800$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $3,628,800$