28404844 has 18 divisors (see below), whose sum is σ = 53827620. Its totient is φ = 13109616.

The previous prime is 28404809. The next prime is 28404853. The reversal of 28404844 is 44840482.

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 in 5 ways as a sum of consecutive naturals, for example, 20334 + ... + 21685.

Almost surely, 2^28404844 is an apocalyptic number.

It is an amenable number.

28404844 is a deficient number, since it is larger than the sum of its proper divisors (25422776).

28404844 is a wasteful number, since it uses less digits than its factorization.

28404844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42049 (or 42034 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 34.

The square root of 28404844 is about 5329.6194986134. The cubic root of 28404844 is about 305.1154055794.

The spelling of 28404844 in words is "twenty-eight million, four hundred four thousand, eight hundred forty-four".