28840912 has 20 divisors (see below), whose sum is σ = 57682816. Its totient is φ = 13955040.

The previous prime is 28840907. The next prime is 28840921. The reversal of 28840912 is 21904882.

28840912 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28578 + ... + 29569.

Almost surely, 2^28840912 is an apocalyptic number.

It is an amenable number.

28840912 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28840912 is a wasteful number, since it uses less digits than its factorization.

28840912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58186 (or 58180 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28840912 is about 5370.3735438049. The cubic root of 28840912 is about 306.6688489658.

The spelling of 28840912 in words is "twenty-eight million, eight hundred forty thousand, nine hundred twelve".