28712896 has 28 divisors (see below), whose sum is σ = 57378600. Its totient is φ = 14255360.

The previous prime is 28712891. The next prime is 28712927. The reversal of 28712896 is 69821782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28712891) 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, 8031 + ... + 11041.

Almost surely, 2^28712896 is an apocalyptic number.

It is an amenable number.

28712896 is a deficient number, since it is larger than the sum of its proper divisors (28665704).

28712896 is a wasteful number, since it uses less digits than its factorization.

28712896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172 (or 3162 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 28712896 is about 5358.4415644850. The cubic root of 28712896 is about 306.2144395195.

The spelling of 28712896 in words is "twenty-eight million, seven hundred twelve thousand, eight hundred ninety-six".