268523905 has 16 divisors (see below), whose sum is σ = 358984080. Its totient is φ = 191455488.

The previous prime is 268523897. The next prime is 268523929. The reversal of 268523905 is 509325862.

It can be written as a sum of positive squares in 8 ways, for example, as 2214144 + 266309761 = 1488^2 + 16319^2 .

It is a cyclic number.

It is not a de Polignac number, because 268523905 - 2³ = 268523897 is a prime.

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, 69342 + ... + 73111.

It is an arithmetic number, because the mean of its divisors is an integer number (22436505).

Almost surely, 2^268523905 is an apocalyptic number.

It is an amenable number.

268523905 is a deficient number, since it is larger than the sum of its proper divisors (90460175).

268523905 is a wasteful number, since it uses less digits than its factorization.

268523905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142500.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 268523905 is about 16386.6990269548. The cubic root of 268523905 is about 645.1504206194.

The spelling of 268523905 in words is "two hundred sixty-eight million, five hundred twenty-three thousand, nine hundred five".