6409904 has 10 divisors (see below), whose sum is σ = 12419220. Its totient is φ = 3204944.

The previous prime is 6409889. The next prime is 6409913. The reversal of 6409904 is 4099046.

It is a happy 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, 200294 + ... + 200325.

It is an arithmetic number, because the mean of its divisors is an integer number (1241922).

Almost surely, 2^6409904 is an apocalyptic number.

It is an amenable number.

6409904 is a deficient number, since it is larger than the sum of its proper divisors (6009316).

6409904 is a wasteful number, since it uses less digits than its factorization.

6409904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400627 (or 400621 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 6409904 is about 2531.7788213033. The cubic root of 6409904 is about 185.7592754344.

The spelling of 6409904 in words is "six million, four hundred nine thousand, nine hundred four".