268989 has 8 divisors (see below), whose sum is σ = 409920. Its totient is φ = 153696.

The previous prime is 268979. The next prime is 268993. The reversal of 268989 is 989862.

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

It is not a de Polignac number, because 268989 - 2⁴ = 268973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 268989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268909) 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, 6384 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (51240).

2²⁶⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

268989 is a deficient number, since it is larger than the sum of its proper divisors (140931).

268989 is a wasteful number, since it uses less digits than its factorization.

268989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12819.

The product of its digits is 62208, while the sum is 42.

The square root of 268989 is about 518.6414946762. The cubic root of 268989 is about 64.5522681908.

The spelling of 268989 in words is "two hundred sixty-eight thousand, nine hundred eighty-nine".