634

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Number

$634$ (six hundred and thirty-four) is:

$2 \times 317$

The smallest positive integer which can be expressed as the sum of $2$ distinct lucky numbers in $25$ different ways

The $28$th Smith number after $4$, $22$, $27$, $58$, $\ldots$, $454$, $483$, $517$, $526$, $535$, $562$, $576$, $588$, $627$:

$6 + 3 + 4 = 2 + 3 + 1 + 7 = 13$

Also see

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