305 (number)

305 is the natural number following 304 and preceding 306.

In mathematics

 * 305 is an odd composite number with two prime factors.
 * 305 is the convolution of the first 7 primes with themselves.
 * 305 is the fifth hexagonal prism number which is defined by (n+1)(3n2+3n+1).
 * 305 is the hypotenuse of two Pythagorean triples. 3052=2072+2242=1362+2732.

Other fields

 * The calendar years 305 AD and 305 BC.
 * 305 is the number for several highways across the countries of Canada, China, India, Japan, the Philippines, and the United States.