403904 has 14 divisors (see below), whose sum is σ = 801624. Its totient is φ = 201920.

The previous prime is 403901. The next prime is 403933. The reversal of 403904 is 409304.

403904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3092 + ... + 3219.

2⁴⁰³⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

403904 is a deficient number, since it is larger than the sum of its proper divisors (397720).

403904 is an equidigital number, since it uses as much as digits as its factorization.

403904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323 (or 6313 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 403904 is about 635.5344207830. The cubic root of 403904 is about 73.9195619746.

The spelling of 403904 in words is "four hundred three thousand, nine hundred four".