39928065 has 8 divisors (see below), whose sum is σ = 63884928. Its totient is φ = 21294960.

The previous prime is 39928039. The next prime is 39928079. The reversal of 39928065 is 56082993.

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

It is not a de Polignac number, because 39928065 - 2⁶ = 39928001 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330921 + ... + 1330950.

It is an arithmetic number, because the mean of its divisors is an integer number (7985616).

Almost surely, 2^39928065 is an apocalyptic number.

It is an amenable number.

39928065 is a deficient number, since it is larger than the sum of its proper divisors (23956863).

39928065 is a wasteful number, since it uses less digits than its factorization.

39928065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661879.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 39928065 is about 6318.8658001258. The cubic root of 39928065 is about 341.7900544501.

The spelling of 39928065 in words is "thirty-nine million, nine hundred twenty-eight thousand, sixty-five".