39972916 has 24 divisors (see below), whose sum is σ = 74760840. Its totient is φ = 18634752.

The previous prime is 39972893. The next prime is 39972923. The reversal of 39972916 is 61927993.

It can be written as a sum of positive squares in 4 ways, for example, as 25502500 + 14470416 = 5050^2 + 3804^2 .

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4716 + ... + 10108.

It is an arithmetic number, because the mean of its divisors is an integer number (3115035).

Almost surely, 2^39972916 is an apocalyptic number.

It is an amenable number.

39972916 is a deficient number, since it is larger than the sum of its proper divisors (34787924).

39972916 is a wasteful number, since it uses less digits than its factorization.

39972916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523 (or 5521 counting only the distinct ones).

The product of its digits is 183708, while the sum is 46.

The square root of 39972916 is about 6322.4137795624. The cubic root of 39972916 is about 341.9179835931.

The spelling of 39972916 in words is "thirty-nine million, nine hundred seventy-two thousand, nine hundred sixteen".