5540

5540 = 2 x 2 x 5 x 277.

5540 has two representations as a sum of two squares: 5540 = 8² + 74² = 38² + 64².

5540 is the number of walks within N³ (the first octant of Z³) starting at (0, 0, 0) and consisting of 8 steps taken from {(-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)} (A148966).

309097² = 95540955409 (A116501).

Both 5540 and the 5540th prime (54443) have non-increasing digits (A116067).

The Lego 5540 kit is for a Formula 1 racer.

5540 Smirnova is an asteroid discovered in 1971.

Source: On-Line Encyclopedia of Integer Sequences