39660028 has 12 divisors (see below), whose sum is σ = 69491520. Its totient is φ = 19805312.

The previous prime is 39660017. The next prime is 39660107. The reversal of 39660028 is 82006693.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 39659975 and 39660002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293 + ... + 9196.

It is an arithmetic number, because the mean of its divisors is an integer number (5790960).

Almost surely, 2^39660028 is an apocalyptic number.

It is an amenable number.

39660028 is a deficient number, since it is larger than the sum of its proper divisors (29831492).

39660028 is a wasteful number, since it uses less digits than its factorization.

39660028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12356 (or 12354 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 39660028 is about 6297.6208205957. The cubic root of 39660028 is about 341.0235247198.

The spelling of 39660028 in words is "thirty-nine million, six hundred sixty thousand, twenty-eight".