640

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Number

$640$ (six hundred and forty) is:

$2^7 \times 5$

The $12$th positive integer after $128$, $192$, $256$, $288$, $320$, $384$, $432$, $448$, $480$, $512$, $576$ with $7$ or more prime factors:

$640 = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \paren {\times \, 5}$

Also see

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