Wednesday, April 2, 2014


8490 = 2 x 3 x 5 x 283.

8490 is the number of compositions of 22 into 5 ordered relatively prime parts (A000743).

8490 is the number of base 14 7-digit numbers with adjacent digits differing by one or less (A126368).

8490 is a number n for which n' + n and n' - n are both prime, n' being the arithmetic derivative of n (A229272).

8490 is the total number of parts in all partitions of 37 into odd parts (A067588).

8490 is the conjectured lower bound for the number of spheres of radius 1 that can be packed in a sphere of radius 23 (A121346).

Source: OEIS

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