44438221 has 32 divisors (see below), whose sum is σ = 52005888. Its totient is φ = 37739520.

The previous prime is 44438197. The next prime is 44438227. The reversal of 44438221 is 12283444.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44438221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44438221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44438227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 838431 + ... + 838483.

It is an arithmetic number, because the mean of its divisors is an integer number (1625184).

Almost surely, 2^44438221 is an apocalyptic number.

It is an amenable number.

44438221 is a deficient number, since it is larger than the sum of its proper divisors (7567667).

44438221 is a wasteful number, since it uses less digits than its factorization.

44438221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 6144, while the sum is 28.

The square root of 44438221 is about 6666.1998919924. The cubic root of 44438221 is about 354.2029887977.

The spelling of 44438221 in words is "forty-four million, four hundred thirty-eight thousand, two hundred twenty-one".