39689664 has 56 divisors (see below), whose sum is σ = 120018048. Its totient is φ = 11339520.

The previous prime is 39689653. The next prime is 39689693. The reversal of 39689664 is 46698693.

39689664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

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 7 ways as a sum of consecutive naturals, for example, 13422 + ... + 16109.

Almost surely, 2^39689664 is an apocalyptic number.

It is an amenable number.

39689664 is an abundant number, since it is smaller than the sum of its proper divisors (80328384).

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

39689664 is a wasteful number, since it uses less digits than its factorization.

39689664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29553 (or 29543 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 39689664 is about 6299.9733332769. The cubic root of 39689664 is about 341.1084469732.

The spelling of 39689664 in words is "thirty-nine million, six hundred eighty-nine thousand, six hundred sixty-four".