28789924 has 12 divisors (see below), whose sum is σ = 52119900. Its totient is φ = 13898528.

The previous prime is 28789903. The next prime is 28789931. The reversal of 28789924 is 42998782.

It can be written as a sum of positive squares in 2 ways, for example, as 8809024 + 19980900 = 2968^2 + 4470^2 .

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 3 ways as a sum of consecutive naturals, for example, 123979 + ... + 124210.

It is an arithmetic number, because the mean of its divisors is an integer number (4343325).

Almost surely, 2^28789924 is an apocalyptic number.

It is an amenable number.

28789924 is a deficient number, since it is larger than the sum of its proper divisors (23329976).

28789924 is a wasteful number, since it uses less digits than its factorization.

28789924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248222 (or 248220 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 28789924 is about 5365.6242880023. The cubic root of 28789924 is about 306.4880218719.

The spelling of 28789924 in words is "twenty-eight million, seven hundred eighty-nine thousand, nine hundred twenty-four".