858881 has 8 divisors (see below), whose sum is σ = 893760. Its totient is φ = 824688.

The previous prime is 858877. The next prime is 858883. The reversal of 858881 is 188858.

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

It is a cyclic number.

It is not a de Polignac number, because 858881 - 2² = 858877 is a prime.

It is a super-2 number, since 2×858881² = 1475353144322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (858883) 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, 5060 + ... + 5226.

It is an arithmetic number, because the mean of its divisors is an integer number (111720).

2⁸⁵⁸⁸⁸¹ is an apocalyptic number.

It is an amenable number.

858881 is a deficient number, since it is larger than the sum of its proper divisors (34879).

858881 is a wasteful number, since it uses less digits than its factorization.

858881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

The product of its digits is 20480, while the sum is 38.

The square root of 858881 is about 926.7583287999. The cubic root of 858881 is about 95.0555907326.

The spelling of 858881 in words is "eight hundred fifty-eight thousand, eight hundred eighty-one".