4431664 has 20 divisors (see below), whose sum is σ = 8883360. Its totient is φ = 2139200.

The previous prime is 4431659. The next prime is 4431671. The reversal of 4431664 is 4661344.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4312 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (444168).

Almost surely, 2^4431664 is an apocalyptic number.

It is an amenable number.

4431664 is an abundant number, since it is smaller than the sum of its proper divisors (4451696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4431664 is a wasteful number, since it uses less digits than its factorization.

4431664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9588 (or 9582 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 4431664 is about 2105.1517760010. The cubic root of 4431664 is about 164.2563905535.

The spelling of 4431664 in words is "four million, four hundred thirty-one thousand, six hundred sixty-four".