13040404 has 12 divisors (see below), whose sum is σ = 24576244. Its totient is φ = 6018624.

The previous prime is 13040381. The next prime is 13040449. The reversal of 13040404 is 40404031.

It can be written as a sum of positive squares in 2 ways, for example, as 7290000 + 5750404 = 2700^2 + 2398^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125337 + ... + 125440.

Almost surely, 2^13040404 is an apocalyptic number.

It is an amenable number.

13040404 is a deficient number, since it is larger than the sum of its proper divisors (11535840).

13040404 is a wasteful number, since it uses less digits than its factorization.

13040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250794 (or 250792 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 13040404 is about 3611.1499553466. The cubic root of 13040404 is about 235.3768151128.

Adding to 13040404 its reverse (40404031), we get a palindrome (53444435).

The spelling of 13040404 in words is "thirteen million, forty thousand, four hundred four".