444490421 has 4 divisors (see below), whose sum is σ = 453947712. Its totient is φ = 435033132.

The previous prime is 444490411. The next prime is 444490429. The reversal of 444490421 is 124094444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444490421 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 (444490429) 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, 4728575 + ... + 4728668.

It is an arithmetic number, because the mean of its divisors is an integer number (113486928).

Almost surely, 2^444490421 is an apocalyptic number.

It is an amenable number.

444490421 is a deficient number, since it is larger than the sum of its proper divisors (9457291).

444490421 is an equidigital number, since it uses as much as digits as its factorization.

444490421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457290.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 444490421 is about 21082.9414693491. The cubic root of 444490421 is about 763.1691424705.

The spelling of 444490421 in words is "four hundred forty-four million, four hundred ninety thousand, four hundred twenty-one".