39729212 has 6 divisors (see below), whose sum is σ = 69526128. Its totient is φ = 19864604.

The previous prime is 39729203. The next prime is 39729223. The reversal of 39729212 is 21292793.

39729212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×39729212² = 3156820572281888, which contains 22 as substring.

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, 4966148 + ... + 4966155.

It is an arithmetic number, because the mean of its divisors is an integer number (11587688).

Almost surely, 2^39729212 is an apocalyptic number.

It is an amenable number.

39729212 is a deficient number, since it is larger than the sum of its proper divisors (29796916).

39729212 is a wasteful number, since it uses less digits than its factorization.

39729212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932307 (or 9932305 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 39729212 is about 6303.1112952256. Note that the first 3 decimals coincide. The cubic root of 39729212 is about 341.2217063403.

The spelling of 39729212 in words is "thirty-nine million, seven hundred twenty-nine thousand, two hundred twelve".