268490805 has 32 divisors (see below), whose sum is σ = 493309440. Its totient is φ = 123324480.

The previous prime is 268490797. The next prime is 268490813. The reversal of 268490805 is 508094862.

It is an interprime number because it is at equal distance from previous prime (268490797) and next prime (268490813).

It is not a de Polignac number, because 268490805 - 2³ = 268490797 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39687 + ... + 45956.

It is an arithmetic number, because the mean of its divisors is an integer number (15415920).

Almost surely, 2^268490805 is an apocalyptic number.

It is an amenable number.

268490805 is a deficient number, since it is larger than the sum of its proper divisors (224818635).

268490805 is a wasteful number, since it uses less digits than its factorization.

268490805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85681.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 268490805 is about 16385.6890303704. The cubic root of 268490805 is about 645.1239110536.

The spelling of 268490805 in words is "two hundred sixty-eight million, four hundred ninety thousand, eight hundred five".