39909668 has 12 divisors (see below), whose sum is σ = 70826112. Its totient is φ = 19673640.

The previous prime is 39909629. The next prime is 39909703. The reversal of 39909668 is 86690993.

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, 69980 + ... + 70547.

It is an arithmetic number, because the mean of its divisors is an integer number (5902176).

Almost surely, 2^39909668 is an apocalyptic number.

It is an amenable number.

39909668 is a deficient number, since it is larger than the sum of its proper divisors (30916444).

39909668 is a wasteful number, since it uses less digits than its factorization.

39909668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140602 (or 140600 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 39909668 is about 6317.4099122979. The cubic root of 39909668 is about 341.7375527190.

The spelling of 39909668 in words is "thirty-nine million, nine hundred nine thousand, six hundred sixty-eight".