268831 has 4 divisors (see below), whose sum is σ = 283000. Its totient is φ = 254664.

The previous prime is 268823. The next prime is 268841. The reversal of 268831 is 138862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138862 = 2 ⋅69431.

It is a cyclic number.

It is not a de Polignac number, because 268831 - 2³ = 268823 is a prime.

It is a super-2 number, since 2×268831² = 144540213122, which contains 22 as substring.

It is an Ulam number.

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 268831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268811) 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, 7056 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (70750).

2²⁶⁸⁸³¹ is an apocalyptic number.

268831 is a deficient number, since it is larger than the sum of its proper divisors (14169).

268831 is a wasteful number, since it uses less digits than its factorization.

268831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14168.

The product of its digits is 2304, while the sum is 28.

The square root of 268831 is about 518.4891512848. The cubic root of 268831 is about 64.5396267123.

The spelling of 268831 in words is "two hundred sixty-eight thousand, eight hundred thirty-one".