1280494656 has 315 divisors, whose sum is σ = 4478573847. Its totient is φ = 360702720.

The previous prime is 1280494639. The next prime is 1280494673. The reversal of 1280494656 is 6564940821.

The square root of 1280494656 is 35784.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1280494639) and next prime (1280494673).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 18035101 + ... + 18035171.

Almost surely, 2^1280494656 is an apocalyptic number.

1280494656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1280494656 is the 35784-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280494656

1280494656 is an abundant number, since it is smaller than the sum of its proper divisors (3198079191).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280494656 is an frugal number, since it uses more digits than its factorization.

1280494656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The cubic root of 1280494656 is about 1085.9068935166.

The spelling of 1280494656 in words is "one billion, two hundred eighty million, four hundred ninety-four thousand, six hundred fifty-six".