39649668 has 24 divisors (see below), whose sum is σ = 92631168. Its totient is φ = 13200096.

The previous prime is 39649667. The next prime is 39649691. The reversal of 39649668 is 86694693.

It is a self number, because there is not a number n which added to its sum of digits gives 39649668.

It is not an unprimeable number, because it can be changed into a prime (39649667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11605 + ... + 14627.

It is an arithmetic number, because the mean of its divisors is an integer number (3859632).

Almost surely, 2^39649668 is an apocalyptic number.

It is an amenable number.

39649668 is an abundant number, since it is smaller than the sum of its proper divisors (52981500).

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

39649668 is a wasteful number, since it uses less digits than its factorization.

39649668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123 (or 4121 counting only the distinct ones).

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

The square root of 39649668 is about 6296.7982340234. The cubic root of 39649668 is about 340.9938280574.

The spelling of 39649668 in words is "thirty-nine million, six hundred forty-nine thousand, six hundred sixty-eight".