868558 has 8 divisors (see below), whose sum is σ = 1344960. Its totient is φ = 420240.

The previous prime is 868537. The next prime is 868559. The reversal of 868558 is 855868.

868558 is nontrivially palindromic in base 3.

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

It is a self number, because there is not a number n which added to its sum of digits gives 868558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868559) 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, 6943 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (168120).

2⁸⁶⁸⁵⁵⁸ is an apocalyptic number.

868558 is a deficient number, since it is larger than the sum of its proper divisors (476402).

868558 is a wasteful number, since it uses less digits than its factorization.

868558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14042.

The product of its digits is 76800, while the sum is 40.

The square root of 868558 is about 931.9645916021. The cubic root of 868558 is about 95.4112549662.

The spelling of 868558 in words is "eight hundred sixty-eight thousand, five hundred fifty-eight".