4044444421 has 16 divisors (see below), whose sum is σ = 4199388160. Its totient is φ = 3892477680.

The previous prime is 4044444403. The next prime is 4044444431. The reversal of 4044444421 is 1244444404.

It is a cyclic number.

It is not a de Polignac number, because 4044444421 - 2⁷ = 4044444293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4044444431) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2346466 + ... + 2348188.

It is an arithmetic number, because the mean of its divisors is an integer number (262461760).

Almost surely, 2^4044444421 is an apocalyptic number.

It is an amenable number.

4044444421 is a deficient number, since it is larger than the sum of its proper divisors (154943739).

4044444421 is a wasteful number, since it uses less digits than its factorization.

4044444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 32768, while the sum is 31.

The square root of 4044444421 is about 63595.9465768063. The cubic root of 4044444421 is about 1593.2586704226.

Adding to 4044444421 its reverse (1244444404), we get a palindrome (5288888825).

The spelling of 4044444421 in words is "four billion, forty-four million, four hundred forty-four thousand, four hundred twenty-one".