39975920 has 40 divisors (see below), whose sum is σ = 96154560. Its totient is φ = 15438080.

The previous prime is 39975907. The next prime is 39975937. The reversal of 39975920 is 2957993.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6296 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (2403864).

Almost surely, 2^39975920 is an apocalyptic number.

It is an amenable number.

39975920 is an abundant number, since it is smaller than the sum of its proper divisors (56178640).

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

39975920 is a wasteful number, since it uses less digits than its factorization.

39975920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17273 (or 17267 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 39975920 is about 6322.6513425935. The cubic root of 39975920 is about 341.9265485249.

The spelling of 39975920 in words is "thirty-nine million, nine hundred seventy-five thousand, nine hundred twenty".