868858 has 8 divisors (see below), whose sum is σ = 1333728. Its totient is φ = 424284.

The previous prime is 868849. The next prime is 868867. The reversal of 868858 is 858868.

It is an interprime number because it is at equal distance from previous prime (868849) and next prime (868867).

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

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a plaindrome in base 15.

It is an unprimeable number.

868858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4966 + ... + 5137.

It is an arithmetic number, because the mean of its divisors is an integer number (166716).

2⁸⁶⁸⁸⁵⁸ is an apocalyptic number.

868858 is a deficient number, since it is larger than the sum of its proper divisors (464870).

868858 is a wasteful number, since it uses less digits than its factorization.

868858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10148.

The product of its digits is 122880, while the sum is 43.

The square root of 868858 is about 932.1255280272. The cubic root of 868858 is about 95.4222387200.

The spelling of 868858 in words is "eight hundred sixty-eight thousand, eight hundred fifty-eight".