28678808 has 8 divisors (see below), whose sum is σ = 53772780. Its totient is φ = 14339400.

The previous prime is 28678801. The next prime is 28678823. The reversal of 28678808 is 80887682.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678801) 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 as a sum of consecutive naturals, namely, 1792418 + ... + 1792433.

Almost surely, 2^28678808 is an apocalyptic number.

It is an amenable number.

28678808 is a deficient number, since it is larger than the sum of its proper divisors (25093972).

28678808 is a wasteful number, since it uses less digits than its factorization.

28678808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584857 (or 3584853 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 47.

The square root of 28678808 is about 5355.2598443026. The cubic root of 28678808 is about 306.0932120949.

The spelling of 28678808 in words is "twenty-eight million, six hundred seventy-eight thousand, eight hundred eight".