268939989 has 12 divisors (see below), whose sum is σ = 405359136. Its totient is φ = 171497832.

The previous prime is 268939981. The next prime is 268939991. The reversal of 268939989 is 989939862.

It is not a de Polignac number, because 268939989 - 2³ = 268939981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268939981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 649407 + ... + 649820.

It is an arithmetic number, because the mean of its divisors is an integer number (33779928).

Almost surely, 2^268939989 is an apocalyptic number.

It is an amenable number.

268939989 is a deficient number, since it is larger than the sum of its proper divisors (136419147).

268939989 is a wasteful number, since it uses less digits than its factorization.

268939989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299256 (or 1299253 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 268939989 is about 16399.3898971882. The cubic root of 268939989 is about 645.4834738190.

The spelling of 268939989 in words is "two hundred sixty-eight million, nine hundred thirty-nine thousand, nine hundred eighty-nine".