478

478 = 2 x 239.

478 is the seventh Pell-Lucas number (A002203).

478 is the number of primes less than 3,400 (A028505).

478 is the number of ways of making change for 53 cents using coins of 1, 2, 5, 10, 25, and 50 cents (A001302).

478 is 111011110 in base 2 (binary).

Source: What's Special About This Number?

408

408 = 2 x 2 x 2 x 3 x 17.

408 is the sum of four consecutive primes: 408 = 97 + 101 + 103 + 107. It is also the sum of eight consecutive primes: 408 = 37 + 41 + 43 + 47 + 53 + 59 + 61 + 67.

408 is an octagonal number.

408 is the eighth Pell number.

408 is 3113 in base 5, 1122 in base 7, and 212 in base 14.

408 is the telephone area code for the Silicon Valley, California.

Source: What's Special About This Number?

985

985 = 5 x 197.

985 has two representations as a sum of two squares: 985 = 12² + 29² = 16² + 27².

985 is the hypotenuse of two primitive Pythagorean triples: 985² = 473² + 864² = 696² + 697². It is the fourth Pythagorean triple where two sides are consecutive integers.

985 is the ninth Pell number.

985 is the telephone area code for southeastern Louisiana.

Source: What's Special About This Number?