444606021 has 12 divisors (see below), whose sum is σ = 645923148. Its totient is φ = 294689664.

The previous prime is 444606013. The next prime is 444606053. The reversal of 444606021 is 120606444.

It can be written as a sum of positive squares in 2 ways, for example, as 362902500 + 81703521 = 19050^2 + 9039^2 .

It is not a de Polignac number, because 444606021 - 2³ = 444606013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444606121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141220 + ... + 144333.

It is an arithmetic number, because the mean of its divisors is an integer number (53826929).

Almost surely, 2^444606021 is an apocalyptic number.

It is an amenable number.

444606021 is a deficient number, since it is larger than the sum of its proper divisors (201317127).

444606021 is a wasteful number, since it uses less digits than its factorization.

444606021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285732 (or 285729 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 444606021 is about 21085.6828440532. The cubic root of 444606021 is about 763.2352966565.

The spelling of 444606021 in words is "four hundred forty-four million, six hundred six thousand, twenty-one".