28788664 has 16 divisors (see below), whose sum is σ = 55438200. Its totient is φ = 14005152.

The previous prime is 28788659. The next prime is 28788673. The reversal of 28788664 is 46688782.

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, 48334 + ... + 48925.

Almost surely, 2^28788664 is an apocalyptic number.

It is an amenable number.

28788664 is a deficient number, since it is larger than the sum of its proper divisors (26649536).

28788664 is a wasteful number, since it uses less digits than its factorization.

28788664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97302 (or 97298 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 28788664 is about 5365.5068726077. The cubic root of 28788664 is about 306.4835506254.

The spelling of 28788664 in words is "twenty-eight million, seven hundred eighty-eight thousand, six hundred sixty-four".