39947252 has 6 divisors (see below), whose sum is σ = 69907698. Its totient is φ = 19973624.

The previous prime is 39947249. The next prime is 39947287. The reversal of 39947252 is 25274993.

39947252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 39866596 + 80656 = 6314^2 + 284^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993403 + ... + 4993410.

It is an arithmetic number, because the mean of its divisors is an integer number (11651283).

Almost surely, 2^39947252 is an apocalyptic number.

It is an amenable number.

39947252 is a deficient number, since it is larger than the sum of its proper divisors (29960446).

39947252 is a wasteful number, since it uses less digits than its factorization.

39947252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9986817 (or 9986815 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 39947252 is about 6320.3838491028. The cubic root of 39947252 is about 341.8447935216.

The spelling of 39947252 in words is "thirty-nine million, nine hundred forty-seven thousand, two hundred fifty-two".