6858864 has 40 divisors (see below), whose sum is σ = 19688720. Its totient is φ = 2286144.

The previous prime is 6858827. The next prime is 6858869. The reversal of 6858864 is 4688586.

6858864 is a `hidden beast` number, since 6 + 8 + 588 + 64 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6858869) 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, 7507 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (492218).

Almost surely, 2^6858864 is an apocalyptic number.

It is an amenable number.

6858864 is an abundant number, since it is smaller than the sum of its proper divisors (12829856).

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

6858864 is a wasteful number, since it uses less digits than its factorization.

6858864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15894 (or 15882 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 6858864 is about 2618.9432983553. The cubic root of 6858864 is about 189.9987442207.

The spelling of 6858864 in words is "six million, eight hundred fifty-eight thousand, eight hundred sixty-four".