6408904 has 32 divisors (see below), whose sum is σ = 12767040. Its totient is φ = 3009600.

The previous prime is 6408901. The next prime is 6408907. The reversal of 6408904 is 4098046.

It is an interprime number because it is at equal distance from previous prime (6408901) and next prime (6408907).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10939 + ... + 11509.

It is an arithmetic number, because the mean of its divisors is an integer number (398970).

Almost surely, 2^6408904 is an apocalyptic number.

It is an amenable number.

6408904 is a deficient number, since it is larger than the sum of its proper divisors (6358136).

6408904 is a wasteful number, since it uses less digits than its factorization.

6408904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6408904 is about 2531.5813239949. The cubic root of 6408904 is about 185.7496149187.

The spelling of 6408904 in words is "six million, four hundred eight thousand, nine hundred four".