4431645928 has 16 divisors (see below), whose sum is σ = 8352392580. Its totient is φ = 2204341248.

The previous prime is 4431645893. The next prime is 4431645929. The reversal of 4431645928 is 8295461344.

It can be written as a sum of positive squares in 2 ways, for example, as 4374764164 + 56881764 = 66142^2 + 7542^2 .

It is not an unprimeable number, because it can be changed into a prime (4431645929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433575 + ... + 1436662.

Almost surely, 2^4431645928 is an apocalyptic number.

It is an amenable number.

4431645928 is a deficient number, since it is larger than the sum of its proper divisors (3920746652).

4431645928 is a wasteful number, since it uses less digits than its factorization.

4431645928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870436 (or 2870432 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 4431645928 is about 66570.6085896772. The cubic root of 4431645928 is about 1642.5616727799.

The spelling of 4431645928 in words is "four billion, four hundred thirty-one million, six hundred forty-five thousand, nine hundred twenty-eight".