39840668 has 24 divisors (see below), whose sum is σ = 79884000. Its totient is φ = 17031168.

The previous prime is 39840653. The next prime is 39840677. The reversal of 39840668 is 86604893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10988 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (3328500).

Almost surely, 2^39840668 is an apocalyptic number.

It is an amenable number.

39840668 is an abundant number, since it is smaller than the sum of its proper divisors (40043332).

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

39840668 is a wasteful number, since it uses less digits than its factorization.

39840668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 39840668 is about 6311.9464509769. The cubic root of 39840668 is about 341.5404952597.

The spelling of 39840668 in words is "thirty-nine million, eight hundred forty thousand, six hundred sixty-eight".