403404 has 12 divisors (see below), whose sum is σ = 941304. Its totient is φ = 134464.

The previous prime is 403391. The next prime is 403433. The reversal of 403404 is 404304.

403404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 403404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16797 + ... + 16820.

It is an arithmetic number, because the mean of its divisors is an integer number (78442).

2⁴⁰³⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

403404 is an abundant number, since it is smaller than the sum of its proper divisors (537900).

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

403404 is a wasteful number, since it uses less digits than its factorization.

403404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33624 (or 33622 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 403404 is about 635.1409292433. The cubic root of 403404 is about 73.8890472628.

Adding to 403404 its reverse (404304), we get a palindrome (807708).

Subtracting 403404 from its reverse (404304), we obtain a square (900 = 30²).

The spelling of 403404 in words is "four hundred three thousand, four hundred four", and thus it is an iban number.