268631 has 4 divisors (see below), whose sum is σ = 293064. Its totient is φ = 244200.

The previous prime is 268613. The next prime is 268637. The reversal of 268631 is 136862.

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

It is a de Polignac number, because none of the positive numbers 2^k-268631 is a prime.

It is a super-2 number, since 2×268631² = 144325228322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 268631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12200 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (73266).

2²⁶⁸⁶³¹ is an apocalyptic number.

268631 is a deficient number, since it is larger than the sum of its proper divisors (24433).

268631 is a wasteful number, since it uses less digits than its factorization.

268631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24432.

The product of its digits is 1728, while the sum is 26.

The square root of 268631 is about 518.2962473335. The cubic root of 268631 is about 64.5236177356.

Subtracting from 268631 its reverse (136862), we obtain a square (131769 = 363²).

The spelling of 268631 in words is "two hundred sixty-eight thousand, six hundred thirty-one".