39928679 has 12 divisors (see below), whose sum is σ = 48051000. Its totient is φ = 33043248.

The previous prime is 39928649. The next prime is 39928739. The reversal of 39928679 is 97682993.

It is not a de Polignac number, because 39928679 - 2⁸ = 39928423 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 39928679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39928649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12629 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (4004250).

Almost surely, 2^39928679 is an apocalyptic number.

39928679 is a deficient number, since it is larger than the sum of its proper divisors (8122321).

39928679 is a wasteful number, since it uses less digits than its factorization.

39928679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28142 (or 28135 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 53.

The square root of 39928679 is about 6318.9143846075. The cubic root of 39928679 is about 341.7918064176.

The spelling of 39928679 in words is "thirty-nine million, nine hundred twenty-eight thousand, six hundred seventy-nine".