13203904 has 28 divisors (see below), whose sum is σ = 29945584. Its totient is φ = 5658624.

The previous prime is 13203901. The next prime is 13203913. The reversal of 13203904 is 40930231.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13203901) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 14289 + ... + 15184.

Almost surely, 2^13203904 is an apocalyptic number.

13203904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13203904 is an abundant number, since it is smaller than the sum of its proper divisors (16741680).

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

13203904 is an equidigital number, since it uses as much as digits as its factorization.

13203904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29492 (or 29482 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13203904 is about 3633.7176555148. The cubic root of 13203904 is about 236.3564469034.

The spelling of 13203904 in words is "thirteen million, two hundred three thousand, nine hundred four".