13661444 has 12 divisors (see below), whose sum is σ = 24463824. Its totient is φ = 6671784.

The previous prime is 13661429. The next prime is 13661447. The reversal of 13661444 is 44416631.

It is not an unprimeable number, because it can be changed into a prime (13661447) 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, 39542 + ... + 39885.

It is an arithmetic number, because the mean of its divisors is an integer number (2038652).

Almost surely, 2^13661444 is an apocalyptic number.

It is an amenable number.

13661444 is a deficient number, since it is larger than the sum of its proper divisors (10802380).

13661444 is a wasteful number, since it uses less digits than its factorization.

13661444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79474 (or 79472 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 13661444 is about 3696.1390666478. The cubic root of 13661444 is about 239.0555708388.

The spelling of 13661444 in words is "thirteen million, six hundred sixty-one thousand, four hundred forty-four".