444400321 has 4 divisors (see below), whose sum is σ = 459724500. Its totient is φ = 429076144.

The previous prime is 444400301. The next prime is 444400337. The reversal of 444400321 is 123004444.

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 260499600 + 183900721 = 16140^2 + 13561^2 .

It is a cyclic number.

It is not a de Polignac number, because 444400321 - 2¹⁹ = 443876033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 444400292 and 444400301.

It is not an unprimeable number, because it can be changed into a prime (444400301) 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 3 ways as a sum of consecutive naturals, for example, 7662046 + ... + 7662103.

It is an arithmetic number, because the mean of its divisors is an integer number (114931125).

Almost surely, 2^444400321 is an apocalyptic number.

It is an amenable number.

444400321 is a deficient number, since it is larger than the sum of its proper divisors (15324179).

444400321 is a wasteful number, since it uses less digits than its factorization.

444400321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15324178.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 444400321 is about 21080.8045624450. The cubic root of 444400321 is about 763.1175731655.

Adding to 444400321 its reverse (123004444), we get a palindrome (567404765).

The spelling of 444400321 in words is "four hundred forty-four million, four hundred thousand, three hundred twenty-one".