39681042 has 8 divisors (see below), whose sum is σ = 79362096. Its totient is φ = 13227012.

The previous prime is 39681041. The next prime is 39681053. The reversal of 39681042 is 24018693.

39681042 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.

39681042 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 39680994 and 39681012.

It is not an unprimeable number, because it can be changed into a prime (39681041) 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, 3306748 + ... + 3306759.

It is an arithmetic number, because the mean of its divisors is an integer number (9920262).

Almost surely, 2^39681042 is an apocalyptic number.

39681042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39681042 is a wasteful number, since it uses less digits than its factorization.

39681042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613512.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 39681042 is about 6299.2890074992. The cubic root of 39681042 is about 341.0837449079.

The spelling of 39681042 in words is "thirty-nine million, six hundred eighty-one thousand, forty-two".