28680688 has 10 divisors (see below), whose sum is σ = 55568864. Its totient is φ = 14340336.

The previous prime is 28680679. The next prime is 28680697. The reversal of 28680688 is 88608682.

It is an interprime number because it is at equal distance from previous prime (28680679) and next prime (28680697).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 896256 + ... + 896287.

Almost surely, 2^28680688 is an apocalyptic number.

It is an amenable number.

28680688 is a deficient number, since it is larger than the sum of its proper divisors (26888176).

28680688 is a wasteful number, since it uses less digits than its factorization.

28680688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792551 (or 1792545 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 28680688 is about 5355.4353697902. The cubic root of 28680688 is about 306.0999004559.

The spelling of 28680688 in words is "twenty-eight million, six hundred eighty thousand, six hundred eighty-eight".