868538 has 24 divisors (see below), whose sum is σ = 1485876. Its totient is φ = 380160.

The previous prime is 868537. The next prime is 868559. The reversal of 868538 is 835868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 833569 + 34969 = 913^2 + 187^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (868531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8906 + ... + 9002.

2⁸⁶⁸⁵³⁸ is an apocalyptic number.

868538 is a deficient number, since it is larger than the sum of its proper divisors (617338).

868538 is a wasteful number, since it uses less digits than its factorization.

868538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 147 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 868538 is about 931.9538615189. The cubic root of 868538 is about 95.4105226260.

The spelling of 868538 in words is "eight hundred sixty-eight thousand, five hundred thirty-eight".