380

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Number

$380$ (three hundred and eighty) is:

$2^2 \times 5 \times 19$

The $19$th integer after $7$, $13$, $19$, $35$, $38$, $41$, $57$, $65$, $70$, $125$, $130$, $190$, $205$, $223$, $253$, $285$, $305$, $350$ the decimal representation of whose square can be split into two parts which are each themselves square:

$380^2 = 144 \, 400$; $144 = 12^2$, $400 = 20^2$

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