444021311 has 4 divisors (see below), whose sum is σ = 454347432. Its totient is φ = 433695192.

The previous prime is 444021299. The next prime is 444021313. The reversal of 444021311 is 113120444.

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

It is a cyclic number.

It is not a de Polignac number, because 444021311 - 2²² = 439827007 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 (444021313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5162996 + ... + 5163081.

It is an arithmetic number, because the mean of its divisors is an integer number (113586858).

Almost surely, 2^444021311 is an apocalyptic number.

444021311 is a deficient number, since it is larger than the sum of its proper divisors (10326121).

444021311 is a wasteful number, since it uses less digits than its factorization.

444021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326120.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 444021311 is about 21071.8131872888. The cubic root of 444021311 is about 762.9005680311.

Adding to 444021311 its reverse (113120444), we get a palindrome (557141755).

The spelling of 444021311 in words is "four hundred forty-four million, twenty-one thousand, three hundred eleven".