# 407

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## Number

$407$ (four hundred and seven) is:

$11 \times 37$

The $13$th pluperfect digital invariant after $1$, $2$, $3$, $4$, $5$, $6$, $7$, $8$, $9$, $153$, $370$, $371$:
$4^3 + 0^3 + 7^3 = 64 + 0 + 343 = 407$