13520404 has 12 divisors (see below), whose sum is σ = 24211264. Its totient is φ = 6602904.

The previous prime is 13520387. The next prime is 13520411. The reversal of 13520404 is 40402531.

It is a congruent number.

It is an unprimeable number.

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, 39132 + ... + 39475.

Almost surely, 2^13520404 is an apocalyptic number.

It is an amenable number.

13520404 is a deficient number, since it is larger than the sum of its proper divisors (10690860).

13520404 is a wasteful number, since it uses less digits than its factorization.

13520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78654 (or 78652 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 13520404 is about 3677.0101985173. The cubic root of 13520404 is about 238.2300578950.

Adding to 13520404 its reverse (40402531), we get a palindrome (53922935).

It can be divided in two parts, 13520 and 404, that added together give a square (13924 = 118²).

The spelling of 13520404 in words is "thirteen million, five hundred twenty thousand, four hundred four".