39928066 has 4 divisors (see below), whose sum is σ = 59892102. Its totient is φ = 19964032.

The previous prime is 39928039. The next prime is 39928079. The reversal of 39928066 is 66082993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39879225 + 48841 = 6315^2 + 221^2 .

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 as a sum of consecutive naturals, namely, 9982015 + ... + 9982018.

Almost surely, 2^39928066 is an apocalyptic number.

39928066 is a deficient number, since it is larger than the sum of its proper divisors (19964036).

39928066 is a wasteful number, since it uses less digits than its factorization.

39928066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19964035.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 39928066 is about 6318.8658792540. The cubic root of 39928066 is about 341.7900573035.

The spelling of 39928066 in words is "thirty-nine million, nine hundred twenty-eight thousand, sixty-six".