438

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Number

$438$ (four hundred and thirty-eight) is:

$2 \times 3 \times 73$

The $18$th Smith number after $4$, $22$, $27$, $58$, $85$, $94$, $121$, $166$, $202$, $265$, $274$, $319$, $346$, $355$, $378$, $382$, $391$:

$4 + 3 + 8 = 2 + 3 + 7 + 3 = 15$

The $53$rd sphenic number after $30$, $42$, $66$, $70$, $\ldots$, $385$, $399$, $402$, $406$, $410$, $418$, $426$, $429$, $430$, $434$, $435$:

$438 = 2 \times 3 \times 73$

Also see

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