445665393 has 24 divisors (see below), whose sum is σ = 677064960. Its totient is φ = 282091680.

The previous prime is 445665361. The next prime is 445665397. The reversal of 445665393 is 393566544.

It is not a de Polignac number, because 445665393 - 2⁵ = 445665361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445665397) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 283 + ... + 29856.

It is an arithmetic number, because the mean of its divisors is an integer number (28211040).

Almost surely, 2^445665393 is an apocalyptic number.

It is an amenable number.

445665393 is a deficient number, since it is larger than the sum of its proper divisors (231399567).

445665393 is a wasteful number, since it uses less digits than its factorization.

445665393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30229 (or 30226 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 445665393 is about 21110.7885451965. The cubic root of 445665393 is about 763.8410080280.

The spelling of 445665393 in words is "four hundred forty-five million, six hundred sixty-five thousand, three hundred ninety-three".