445023644 has 18 divisors (see below), whose sum is σ = 843307920. Its totient is φ = 205395216.

The previous prime is 445023617. The next prime is 445023653. The reversal of 445023644 is 446320544.

It is a self number, because there is not a number n which added to its sum of digits gives 445023644.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 328484 + ... + 329835.

It is an arithmetic number, because the mean of its divisors is an integer number (46850440).

Almost surely, 2^445023644 is an apocalyptic number.

It is an amenable number.

445023644 is a deficient number, since it is larger than the sum of its proper divisors (398284276).

445023644 is a wasteful number, since it uses less digits than its factorization.

445023644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658349 (or 658334 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 445023644 is about 21095.5835188316. The cubic root of 445023644 is about 763.4741934559.

The spelling of 445023644 in words is "four hundred forty-five million, twenty-three thousand, six hundred forty-four".