39942772 has 6 divisors (see below), whose sum is σ = 69899858. Its totient is φ = 19971384.

The previous prime is 39942751. The next prime is 39942781. The reversal of 39942772 is 27724993.

It is a happy number.

39942772 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 + 76176 = 6314^2 + 276^2 .

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, 4992843 + ... + 4992850.

Almost surely, 2^39942772 is an apocalyptic number.

It is an amenable number.

39942772 is a deficient number, since it is larger than the sum of its proper divisors (29957086).

39942772 is a wasteful number, since it uses less digits than its factorization.

39942772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9985697 (or 9985695 counting only the distinct ones).

The product of its digits is 190512, while the sum is 43.

The square root of 39942772 is about 6320.0294303112. The cubic root of 39942772 is about 341.8320139865.

The spelling of 39942772 in words is "thirty-nine million, nine hundred forty-two thousand, seven hundred seventy-two".