13556444 has 12 divisors (see below), whose sum is σ = 25880568. Its totient is φ = 6162000.

The previous prime is 13556441. The next prime is 13556447. The reversal of 13556444 is 44465531.

It is an interprime number because it is at equal distance from previous prime (13556441) and next prime (13556447).

It is a self number, because there is not a number n which added to its sum of digits gives 13556444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13556441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154007 + ... + 154094.

It is an arithmetic number, because the mean of its divisors is an integer number (2156714).

Almost surely, 2^13556444 is an apocalyptic number.

It is an amenable number.

13556444 is a deficient number, since it is larger than the sum of its proper divisors (12324124).

13556444 is a wasteful number, since it uses less digits than its factorization.

13556444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308116 (or 308114 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 13556444 is about 3681.9076577231. The cubic root of 13556444 is about 238.4415455049.

The spelling of 13556444 in words is "thirteen million, five hundred fifty-six thousand, four hundred forty-four".