13504404 has 48 divisors (see below), whose sum is σ = 33247872. Its totient is φ = 4257792.

The previous prime is 13504399. The next prime is 13504411. The reversal of 13504404 is 40440531.

13504404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30972 + ... + 31404.

It is an arithmetic number, because the mean of its divisors is an integer number (692664).

Almost surely, 2^13504404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13504404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16623936).

13504404 is an abundant number, since it is smaller than the sum of its proper divisors (19743468).

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

13504404 is a wasteful number, since it uses less digits than its factorization.

13504404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 13504404 is about 3674.8338737962. The cubic root of 13504404 is about 238.1360472551.

Adding to 13504404 its reverse (40440531), we get a palindrome (53944935).

The spelling of 13504404 in words is "thirteen million, five hundred four thousand, four hundred four".