268518831 has 8 divisors (see below), whose sum is σ = 409171584. Its totient is φ = 153439320.

The previous prime is 268518821. The next prime is 268518851. The reversal of 268518831 is 138815862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 268518831 - 2¹¹ = 268516783 is a prime.

It is a super-2 number, since 2×268518831² = 144204725203213122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268518821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6393285 + ... + 6393326.

It is an arithmetic number, because the mean of its divisors is an integer number (51146448).

Almost surely, 2^268518831 is an apocalyptic number.

268518831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

268518831 is a deficient number, since it is larger than the sum of its proper divisors (140652753).

268518831 is a wasteful number, since it uses less digits than its factorization.

268518831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12786621.

The product of its digits is 92160, while the sum is 42.

The square root of 268518831 is about 16386.5442055364. The cubic root of 268518831 is about 645.1463570286.

The spelling of 268518831 in words is "two hundred sixty-eight million, five hundred eighteen thousand, eight hundred thirty-one".