868540 has 12 divisors (see below), whose sum is σ = 1823976. Its totient is φ = 347408.

The previous prime is 868537. The next prime is 868559. The reversal of 868540 is 45868.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21694 + ... + 21733.

It is an arithmetic number, because the mean of its divisors is an integer number (151998).

2⁸⁶⁸⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

868540 is an abundant number, since it is smaller than the sum of its proper divisors (955436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

868540 is a wasteful number, since it uses less digits than its factorization.

868540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43436 (or 43434 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 868540 is about 931.9549345328. The cubic root of 868540 is about 95.4105958605.

The spelling of 868540 in words is "eight hundred sixty-eight thousand, five hundred forty".