39689745 has 16 divisors (see below), whose sum is σ = 63615552. Its totient is φ = 21130560.

The previous prime is 39689737. The next prime is 39689807. The reversal of 39689745 is 54798693.

39689745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39689745 - 2³ = 39689737 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 7914 + ... + 11916.

It is an arithmetic number, because the mean of its divisors is an integer number (3975972).

Almost surely, 2^39689745 is an apocalyptic number.

It is an amenable number.

39689745 is a deficient number, since it is larger than the sum of its proper divisors (23925807).

39689745 is a wasteful number, since it uses less digits than its factorization.

39689745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672.

The product of its digits is 1632960, while the sum is 51.

The square root of 39689745 is about 6299.9797618723. The cubic root of 39689745 is about 341.1086790216.

The spelling of 39689745 in words is "thirty-nine million, six hundred eighty-nine thousand, seven hundred forty-five".