Tuesday, April 5, 2011


380 = 22 x 5 x 19.

380 is a pronic number because it is the product of two consecutive numbers: 380 = 19 x 20. Hence, it is also twice a triangular number.

380 is the smallest number divisible by 5 of the form p(p + 1) where p is a prime and doesn't equal 5.

380 is a number that cannot be written as a sum of three squares.

380 is the number of necklaces possible with 13 beads, each being one of two possible colors.

The Airbus A380 aircraft, the largest commercial aircraft flying today, was introduced in the year 2007.

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