13405444 has 12 divisors (see below), whose sum is σ = 25264204. Its totient is φ = 6187104.

The previous prime is 13405429. The next prime is 13405451. The reversal of 13405444 is 44450431.

It can be written as a sum of positive squares in 2 ways, for example, as 1295044 + 12110400 = 1138^2 + 3480^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128847 + ... + 128950.

Almost surely, 2^13405444 is an apocalyptic number.

It is an amenable number.

13405444 is a deficient number, since it is larger than the sum of its proper divisors (11858760).

13405444 is a wasteful number, since it uses less digits than its factorization.

13405444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257814 (or 257812 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 13405444 is about 3661.3445617696. The cubic root of 13405444 is about 237.5529351997.

Adding to 13405444 its reverse (44450431), we get a palindrome (57855875).

The spelling of 13405444 in words is "thirteen million, four hundred five thousand, four hundred forty-four".