13440404 has 24 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 6290816.

The previous prime is 13440397. The next prime is 13440407. The reversal of 13440404 is 40404431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440407) 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 7 ways as a sum of consecutive naturals, for example, 15839 + ... + 16665.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^13440404 is an apocalyptic number.

It is an amenable number.

13440404 is a deficient number, since it is larger than the sum of its proper divisors (11598316).

13440404 is a wasteful number, since it uses less digits than its factorization.

13440404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 13440404 is about 3666.1156555679. The cubic root of 13440404 is about 237.7592603728.

Adding to 13440404 its reverse (40404431), we get a palindrome (53844835).

The spelling of 13440404 in words is "thirteen million, four hundred forty thousand, four hundred four".