27480 is a member of OEIS A343755: number of regions formed by infinite lines when connecting all vertices and all points that divide the sides of an equilateral triangle into n equal parts, here n=10. Starting from n=1, the initial members are 7, 30, 144, 474, 1324, 2934, 5797, 10614, 17424, 27480, ...

Attached image shows the case of n=2.

27480 is a happy, interprime, practical, abundant, pseudoperfect and Zumkeller number.

27480 can be rendered as a digit equation as follows:

-2 + 7 - 4 = 8 ^ 0