268685905 has 4 divisors (see below), whose sum is σ = 322423092. Its totient is φ = 214948720.

The previous prime is 268685891. The next prime is 268685933. The reversal of 268685905 is 509586862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212255761 + 56430144 = 14569^2 + 7512^2 .

It is not a de Polignac number, because 268685905 - 2¹⁹ = 268161617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26868586 + ... + 26868595.

It is an arithmetic number, because the mean of its divisors is an integer number (80605773).

Almost surely, 2^268685905 is an apocalyptic number.

It is an amenable number.

268685905 is a deficient number, since it is larger than the sum of its proper divisors (53737187).

268685905 is an equidigital number, since it uses as much as digits as its factorization.

268685905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53737186.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The square root of 268685905 is about 16391.6413150117. The cubic root of 268685905 is about 645.2801339093.

The spelling of 268685905 in words is "two hundred sixty-eight million, six hundred eighty-five thousand, nine hundred five".