6399632 has 40 divisors (see below), whose sum is σ = 12915840. Its totient is φ = 3070080.

The previous prime is 6399629. The next prime is 6399643. The reversal of 6399632 is 2369936.

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, 77063 + ... + 77145.

It is an arithmetic number, because the mean of its divisors is an integer number (322896).

Almost surely, 2^6399632 is an apocalyptic number.

It is an amenable number.

6399632 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

6399632 is a wasteful number, since it uses less digits than its factorization.

6399632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 225 counting only the distinct ones).

The product of its digits is 52488, while the sum is 38.

The square root of 6399632 is about 2529.7493947030. The cubic root of 6399632 is about 185.6599947249.

The spelling of 6399632 in words is "six million, three hundred ninety-nine thousand, six hundred thirty-two".