39972860 has 12 divisors (see below), whose sum is σ = 83943048. Its totient is φ = 15989136.

The previous prime is 39972859. The next prime is 39972887. The reversal of 39972860 is 6827993.

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 3 ways as a sum of consecutive naturals, for example, 999302 + ... + 999341.

It is an arithmetic number, because the mean of its divisors is an integer number (6995254).

Almost surely, 2^39972860 is an apocalyptic number.

It is an amenable number.

39972860 is an abundant number, since it is smaller than the sum of its proper divisors (43970188).

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

39972860 is a wasteful number, since it uses less digits than its factorization.

39972860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998652 (or 1998650 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 39972860 is about 6322.4093508725. The cubic root of 39972860 is about 341.9178239232.

The spelling of 39972860 in words is "thirty-nine million, nine hundred seventy-two thousand, eight hundred sixty".