444333021 has 24 divisors (see below), whose sum is σ = 675650976. Its totient is φ = 257574240.

The previous prime is 444333017. The next prime is 444333091. The reversal of 444333021 is 120333444.

It is not a de Polignac number, because 444333021 - 2² = 444333017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 444332982 and 444333000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444333011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4731 + ... + 30183.

It is an arithmetic number, because the mean of its divisors is an integer number (28152124).

Almost surely, 2^444333021 is an apocalyptic number.

It is an amenable number.

444333021 is a deficient number, since it is larger than the sum of its proper divisors (231317955).

444333021 is a wasteful number, since it uses less digits than its factorization.

444333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25513 (or 25490 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 444333021 is about 21079.2082631203. The cubic root of 444333021 is about 763.0790490368.

Adding to 444333021 its reverse (120333444), we get a palindrome (564666465).

The spelling of 444333021 in words is "four hundred forty-four million, three hundred thirty-three thousand, twenty-one".