268685 has 16 divisors (see below), whose sum is σ = 356400. Its totient is φ = 193536.

The previous prime is 268661. The next prime is 268693. The reversal of 268685 is 586862.

It can be written as a sum of positive squares in 8 ways, for example, as 9604 + 259081 = 98^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 268685 - 2¹⁰ = 267661 is a prime.

It is an Ulam number.

Its product of digits (23040) is a multiple of the sum of its prime divisors (160).

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, 2411 + ... + 2519.

It is an arithmetic number, because the mean of its divisors is an integer number (22275).

2²⁶⁸⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

268685 is a deficient number, since it is larger than the sum of its proper divisors (87715).

268685 is a wasteful number, since it uses less digits than its factorization.

268685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160.

The product of its digits is 23040, while the sum is 35.

The square root of 268685 is about 518.3483384752. The cubic root of 268685 is about 64.5279409421.

The spelling of 268685 in words is "two hundred sixty-eight thousand, six hundred eighty-five".