13440444 has 24 divisors (see below), whose sum is σ = 31420368. Its totient is φ = 4471680.

The previous prime is 13440437. The next prime is 13440461. The reversal of 13440444 is 44404431.

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 7 ways as a sum of consecutive naturals, for example, 11704 + ... + 12800.

It is an arithmetic number, because the mean of its divisors is an integer number (1309182).

Almost surely, 2^13440444 is an apocalyptic number.

It is an amenable number.

13440444 is an abundant number, since it is smaller than the sum of its proper divisors (17979924).

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

13440444 is a wasteful number, since it uses less digits than its factorization.

13440444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 13440444 is about 3666.1211109291. The cubic root of 13440444 is about 237.7594962378.

Adding to 13440444 its reverse (44404431), we get a palindrome (57844875).

The spelling of 13440444 in words is "thirteen million, four hundred forty thousand, four hundred forty-four".