13404438 has 24 divisors (see below), whose sum is σ = 30045600. Its totient is φ = 4313904.

The previous prime is 13404427. The next prime is 13404451. The reversal of 13404438 is 83440431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12318 + ... + 13361.

It is an arithmetic number, because the mean of its divisors is an integer number (1251900).

Almost surely, 2^13404438 is an apocalyptic number.

13404438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13404438 is an abundant number, since it is smaller than the sum of its proper divisors (16641162).

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

13404438 is a wasteful number, since it uses less digits than its factorization.

13404438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25716 (or 25713 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 13404438 is about 3661.2071779674. The cubic root of 13404438 is about 237.5469927326.

Adding to 13404438 its reverse (83440431), we get a palindrome (96844869).

It can be divided in two parts, 1340 and 4438, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 13404438 in words is "thirteen million, four hundred four thousand, four hundred thirty-eight".