6399224 has 32 divisors (see below), whose sum is σ = 13278720. Its totient is φ = 2871936.

The previous prime is 6399209. The next prime is 6399251. The reversal of 6399224 is 4229936.

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 7 ways as a sum of consecutive naturals, for example, 3017 + ... + 4679.

It is an arithmetic number, because the mean of its divisors is an integer number (414960).

Almost surely, 2^6399224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6399224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6639360).

6399224 is an abundant number, since it is smaller than the sum of its proper divisors (6879496).

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

6399224 is a wasteful number, since it uses less digits than its factorization.

6399224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1715 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 6399224 is about 2529.6687530189. The cubic root of 6399224 is about 185.6560491393.

The spelling of 6399224 in words is "six million, three hundred ninety-nine thousand, two hundred twenty-four".