6861864 has 32 divisors (see below), whose sum is σ = 17748000. Its totient is φ = 2208192.

The previous prime is 6861851. The next prime is 6861913. The reversal of 6861864 is 4681686.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4234 + ... + 5625.

It is an arithmetic number, because the mean of its divisors is an integer number (554625).

Almost surely, 2^6861864 is an apocalyptic number.

It is an amenable number.

6861864 is an abundant number, since it is smaller than the sum of its proper divisors (10886136).

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

6861864 is a wasteful number, since it uses less digits than its factorization.

6861864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897 (or 9893 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 6861864 is about 2619.5159858264. The cubic root of 6861864 is about 190.0264413801.

The spelling of 6861864 in words is "six million, eight hundred sixty-one thousand, eight hundred sixty-four".