268887881 has 4 divisors (see below), whose sum is σ = 275446164. Its totient is φ = 262329600.

The previous prime is 268887877. The next prime is 268887887. The reversal of 268887881 is 188788862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 262958656 = 2435^2 + 16216^2 .

It is a cyclic number.

It is not a de Polignac number, because 268887881 - 2² = 268887877 is a prime.

It is a super-2 number, since 2×268887881² = 144601385097340322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268887887) 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, 3279080 + ... + 3279161.

It is an arithmetic number, because the mean of its divisors is an integer number (68861541).

Almost surely, 2^268887881 is an apocalyptic number.

It is an amenable number.

268887881 is a deficient number, since it is larger than the sum of its proper divisors (6558283).

268887881 is an equidigital number, since it uses as much as digits as its factorization.

268887881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558282.

The product of its digits is 2752512, while the sum is 56.

The square root of 268887881 is about 16397.8011025869. The cubic root of 268887881 is about 645.4417829502.

The spelling of 268887881 in words is "two hundred sixty-eight million, eight hundred eighty-seven thousand, eight hundred eighty-one".