13040444 has 6 divisors (see below), whose sum is σ = 22820784. Its totient is φ = 6520220.

The previous prime is 13040381. The next prime is 13040449. The reversal of 13040444 is 44404031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630052 + ... + 1630059.

It is an arithmetic number, because the mean of its divisors is an integer number (3803464).

Almost surely, 2^13040444 is an apocalyptic number.

It is an amenable number.

13040444 is a deficient number, since it is larger than the sum of its proper divisors (9780340).

13040444 is a wasteful number, since it uses less digits than its factorization.

13040444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260115 (or 3260113 counting only the distinct ones).

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

The square root of 13040444 is about 3611.1554937443. The cubic root of 13040444 is about 235.3770557767.

Adding to 13040444 its reverse (44404031), we get a palindrome (57444475).

The spelling of 13040444 in words is "thirteen million, forty thousand, four hundred forty-four".