8439664 has 20 divisors (see below), whose sum is σ = 16398504. Its totient is φ = 4207808.

The previous prime is 8439659. The next prime is 8439707. The reversal of 8439664 is 4669348.

8439664 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8439 + ... + 9385.

Almost surely, 2^8439664 is an apocalyptic number.

It is an amenable number.

8439664 is a deficient number, since it is larger than the sum of its proper divisors (7958840).

8439664 is a wasteful number, since it uses less digits than its factorization.

8439664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512 (or 1506 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 8439664 is about 2905.1099807064. The cubic root of 8439664 is about 203.5987242005.

The spelling of 8439664 in words is "eight million, four hundred thirty-nine thousand, six hundred sixty-four".