444639385 has 4 divisors (see below), whose sum is σ = 533567268. Its totient is φ = 355711504.

The previous prime is 444639373. The next prime is 444639421. The reversal of 444639385 is 583936444.

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 153561664 + 291077721 = 12392^2 + 17061^2 .

It is a cyclic number.

It is not a de Polignac number, because 444639385 - 2⁷ = 444639257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44463934 + ... + 44463943.

It is an arithmetic number, because the mean of its divisors is an integer number (133391817).

Almost surely, 2^444639385 is an apocalyptic number.

It is an amenable number.

444639385 is a deficient number, since it is larger than the sum of its proper divisors (88927883).

444639385 is an equidigital number, since it uses as much as digits as its factorization.

444639385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88927882.

The product of its digits is 1244160, while the sum is 46.

The square root of 444639385 is about 21086.4739821526. The cubic root of 444639385 is about 763.2543876751.

The spelling of 444639385 in words is "four hundred forty-four million, six hundred thirty-nine thousand, three hundred eighty-five".