444488021 has 4 divisors (see below), whose sum is σ = 450576972. Its totient is φ = 438399072.

The previous prime is 444488003. The next prime is 444488027. The reversal of 444488021 is 120884444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 325983025 + 118504996 = 18055^2 + 10886^2 .

It is a cyclic number.

It is not a de Polignac number, because 444488021 - 2¹⁴ = 444471637 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 (444488027) 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 3 ways as a sum of consecutive naturals, for example, 3044366 + ... + 3044511.

It is an arithmetic number, because the mean of its divisors is an integer number (112644243).

Almost surely, 2^444488021 is an apocalyptic number.

It is an amenable number.

444488021 is a deficient number, since it is larger than the sum of its proper divisors (6088951).

444488021 is an equidigital number, since it uses as much as digits as its factorization.

444488021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088950.

The product of its (nonzero) digits is 32768, while the sum is 35.

The square root of 444488021 is about 21082.8845512183. The cubic root of 444488021 is about 763.1677689057.

The spelling of 444488021 in words is "four hundred forty-four million, four hundred eighty-eight thousand, twenty-one".