3480 = 2 x 2 x 2 x 3 x 5 x 29.
3480 is a Perrin number (A001608).
3480 is 110110011000 in base 2 (binary). It is 2020 in base 12.
3480 is an octagonal pyramidal number (A002414).
3480 is the number of ways to place two nonattacking queens on an 10 x 10 board (A036464).
Source: What's Special About This Number?
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