784

784 = 2⁴ x 7².

784 is a square number: 28 x 28 = 784.

784 is the square of the sum of the first seven integers: (1 + 2 + 3 + 4 + 5 + 6 + 7)² = 784.

784 is the sum of the first seven cubes: 1³ + 2³ + 3³ + 4³ + 5³ + 6³+ 7³ = 784.

784 is 1002001 in base 3 and 3344 in base 6.

Asteroid 784 Pickeringia was discovered in 1914.

Source: Numeropedia