6864224 has 12 divisors (see below), whose sum is σ = 13514004. Its totient is φ = 3432096.

The previous prime is 6864211. The next prime is 6864233. The reversal of 6864224 is 4224686.

It is a happy number.

It is a super-2 number, since 2×6864224² = 94235142244352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 214507 = 6864224 / (6 + 8 + 6 + 4 + 2 + 2 + 4).

It is a d-powerful number, because it can be written as 6⁴ + 8³ + 6⁶ + 4² + 2¹⁹ + 2²¹ + 4¹¹ .

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 as a sum of consecutive naturals, namely, 107222 + ... + 107285.

It is an arithmetic number, because the mean of its divisors is an integer number (1126167).

Almost surely, 2^6864224 is an apocalyptic number.

It is an amenable number.

6864224 is a deficient number, since it is larger than the sum of its proper divisors (6649780).

6864224 is a wasteful number, since it uses less digits than its factorization.

6864224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214517 (or 214509 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 6864224 is about 2619.9664119984. The cubic root of 6864224 is about 190.0482241396.

The spelling of 6864224 in words is "six million, eight hundred sixty-four thousand, two hundred twenty-four".