268889 has 4 divisors (see below), whose sum is σ = 284724. Its totient is φ = 253056.

The previous prime is 268883. The next prime is 268897. The reversal of 268889 is 988862.

It is a happy number.

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 225625 + 43264 = 475^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 268889 - 2¹² = 264793 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (268883) 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, 7892 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (71181).

2²⁶⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

268889 is a deficient number, since it is larger than the sum of its proper divisors (15835).

268889 is a wasteful number, since it uses less digits than its factorization.

268889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15834.

The product of its digits is 55296, while the sum is 41.

The square root of 268889 is about 518.5450800075. The cubic root of 268889 is about 64.5442678303.

The spelling of 268889 in words is "two hundred sixty-eight thousand, eight hundred eighty-nine".