268891 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 227688.

The previous prime is 268883. The next prime is 268897. The reversal of 268891 is 198862.

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

It is a cyclic number.

It is not a de Polignac number, because 268891 - 2³ = 268883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²⁶⁸⁸⁹¹ is an apocalyptic number.

268891 is a deficient number, since it is larger than the sum of its proper divisors (42149).

268891 is a wasteful number, since it uses less digits than its factorization.

268891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473.

The product of its digits is 6912, while the sum is 34.

The square root of 268891 is about 518.5470084766. The cubic root of 268891 is about 64.5444278569.

The spelling of 268891 in words is "two hundred sixty-eight thousand, eight hundred ninety-one".