244444021 has 8 divisors (see below), whose sum is σ = 256608000. Its totient is φ = 232547520.

The previous prime is 244444001. The next prime is 244444027. The reversal of 244444021 is 120444442.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 244444021 - 2⁷ = 244443893 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 (244444027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64996 + ... + 68653.

It is an arithmetic number, because the mean of its divisors is an integer number (32076000).

Almost surely, 2^244444021 is an apocalyptic number.

It is an amenable number.

244444021 is a deficient number, since it is larger than the sum of its proper divisors (12163979).

244444021 is a wasteful number, since it uses less digits than its factorization.

244444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133739.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 244444021 is about 15634.7056576067. The cubic root of 244444021 is about 625.2587907490.

Adding to 244444021 its reverse (120444442), we get a palindrome (364888463).

The spelling of 244444021 in words is "two hundred forty-four million, four hundred forty-four thousand, twenty-one".