13644442 has 24 divisors (see below), whose sum is σ = 24634260. Its totient is φ = 5644800.

The previous prime is 13644439. The next prime is 13644443. The reversal of 13644442 is 24444631.

It can be written as a sum of positive squares in 2 ways, for example, as 13608721 + 35721 = 3689^2 + 189^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13644442.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13644443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442 + ... + 5242.

Almost surely, 2^13644442 is an apocalyptic number.

13644442 is a deficient number, since it is larger than the sum of its proper divisors (10989818).

13644442 is a wasteful number, since it uses less digits than its factorization.

13644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4839 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 13644442 is about 3693.8383830374. The cubic root of 13644442 is about 238.9563595091.

The spelling of 13644442 in words is "thirteen million, six hundred forty-four thousand, four hundred forty-two".