28708664 has 16 divisors (see below), whose sum is σ = 53922120. Its totient is φ = 14329440.

The previous prime is 28708661. The next prime is 28708717. The reversal of 28708664 is 46680782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28708661) 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, 2354 + ... + 7934.

Almost surely, 2^28708664 is an apocalyptic number.

It is an amenable number.

28708664 is a deficient number, since it is larger than the sum of its proper divisors (25213456).

28708664 is a wasteful number, since it uses less digits than its factorization.

28708664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6230 (or 6226 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 28708664 is about 5358.0466589980. The cubic root of 28708664 is about 306.1993944427.

The spelling of 28708664 in words is "twenty-eight million, seven hundred eight thousand, six hundred sixty-four".