268731 has 16 divisors (see below), whose sum is σ = 410400. Its totient is φ = 173664.

The previous prime is 268729. The next prime is 268733. The reversal of 268731 is 137862.

It is an interprime number because it is at equal distance from previous prime (268729) and next prime (268733).

It is not a de Polignac number, because 268731 - 2¹ = 268729 is a prime.

It is a super-2 number, since 2×268731² = 144432700722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 268695 and 268704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (25650).

2²⁶⁸⁷³¹ is an apocalyptic number.

268731 is a deficient number, since it is larger than the sum of its proper divisors (141669).

268731 is a wasteful number, since it uses less digits than its factorization.

268731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 309 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 268731 is about 518.3927082821. The cubic root of 268731 is about 64.5316232168.

It can be divided in two parts, 268 and 731, that added together give a palindrome (999).

The spelling of 268731 in words is "two hundred sixty-eight thousand, seven hundred thirty-one".