39729746 has 8 divisors (see below), whose sum is σ = 68108160. Its totient is φ = 17027028.

The previous prime is 39729743. The next prime is 39729751. The reversal of 39729746 is 64792793.

39729746 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 39729746.

It is not an unprimeable number, because it can be changed into a prime (39729743) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1418906 + ... + 1418933.

It is an arithmetic number, because the mean of its divisors is an integer number (8513520).

Almost surely, 2^39729746 is an apocalyptic number.

39729746 is a deficient number, since it is larger than the sum of its proper divisors (28378414).

39729746 is a wasteful number, since it uses less digits than its factorization.

39729746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837848.

The product of its digits is 571536, while the sum is 47.

The square root of 39729746 is about 6303.1536551158. The cubic root of 39729746 is about 341.2232351195.

The spelling of 39729746 in words is "thirty-nine million, seven hundred twenty-nine thousand, seven hundred forty-six".