440 (number)

440 (four hundred [and] forty) is the natural number following 439 and preceding 441.

In mathematics
440 has the factorization $2^{3} · 5 · 11.$

440 is:
 * Even
 * The sum of the first 17 prime numbers
 * A harshad number
 * An abundant number
 * A happy number

In science

 * A440 (pitch standard) widely used for the musical note A4, the A above Middle C, often used for tuning instruments