39968685 has 24 divisors (see below), whose sum is σ = 72926880. Its totient is φ = 20194272.

The previous prime is 39968681. The next prime is 39968689. The reversal of 39968685 is 58686993.

It is an interprime number because it is at equal distance from previous prime (39968681) and next prime (39968689).

It is not a de Polignac number, because 39968685 - 2² = 39968681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39968681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22519 + ... + 24228.

It is an arithmetic number, because the mean of its divisors is an integer number (3038620).

Almost surely, 2^39968685 is an apocalyptic number.

It is an amenable number.

39968685 is a deficient number, since it is larger than the sum of its proper divisors (32958195).

39968685 is a wasteful number, since it uses less digits than its factorization.

39968685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46777 (or 46774 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 39968685 is about 6322.0791674891. The cubic root of 39968685 is about 341.9059195410.

The spelling of 39968685 in words is "thirty-nine million, nine hundred sixty-eight thousand, six hundred eighty-five".