6864390 has 48 divisors (see below), whose sum is σ = 19223568. Its totient is φ = 1689408.

The previous prime is 6864383. The next prime is 6864427. The reversal of 6864390 is 934686.

6864390 is a `hidden beast` number, since 6 + 8 + 643 + 9 + 0 = 666.

It is a congruent number.

It is an unprimeable 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 23 ways as a sum of consecutive naturals, for example, 1764 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (400491).

Almost surely, 2^6864390 is an apocalyptic number.

6864390 is an abundant number, since it is smaller than the sum of its proper divisors (12359178).

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

6864390 is a wasteful number, since it uses less digits than its factorization.

6864390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893 (or 5890 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6864390 is about 2619.9980916024. The cubic root of 6864390 is about 190.0497561287.

The spelling of 6864390 in words is "six million, eight hundred sixty-four thousand, three hundred ninety".