1280587896 has 48 divisors (see below), whose sum is σ = 3963726000. Its totient is φ = 365882112.

The previous prime is 1280587873. The next prime is 1280587901. The reversal of 1280587896 is 6987850821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1269921 + ... + 1270928.

It is an arithmetic number, because the mean of its divisors is an integer number (82577625).

Almost surely, 2^1280587896 is an apocalyptic number.

It is an amenable number.

1280587896 is an abundant number, since it is smaller than the sum of its proper divisors (2683138104).

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

1280587896 is a wasteful number, since it uses less digits than its factorization.

1280587896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540868 (or 2540861 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The square root of 1280587896 is about 35785.3027931859. The cubic root of 1280587896 is about 1085.9332498680.

The spelling of 1280587896 in words is "one billion, two hundred eighty million, five hundred eighty-seven thousand, eight hundred ninety-six".