263806868 has 48 divisors (see below), whose sum is σ = 529811520. Its totient is φ = 113923584.

The previous prime is 263806859. The next prime is 263806871. The reversal of 263806868 is 868608362.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80396 + ... + 83612.

It is an arithmetic number, because the mean of its divisors is an integer number (11037740).

Almost surely, 2^263806868 is an apocalyptic number.

It is an amenable number.

263806868 is an abundant number, since it is smaller than the sum of its proper divisors (266004652).

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

263806868 is a wasteful number, since it uses less digits than its factorization.

263806868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336 (or 3334 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 263806868 is about 16242.1324954576. The cubic root of 263806868 is about 641.3503941195.

The spelling of 263806868 in words is "two hundred sixty-three million, eight hundred six thousand, eight hundred sixty-eight".