28789648 has 20 divisors (see below), whose sum is σ = 56567808. Its totient is φ = 14191520.

The previous prime is 28789639. The next prime is 28789681. The reversal of 28789648 is 84698782.

It is a junction number, because it is equal to n+sod(n) for n = 28789595 and 28789604.

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, 11536 + ... + 13807.

Almost surely, 2^28789648 is an apocalyptic number.

It is an amenable number.

28789648 is a deficient number, since it is larger than the sum of its proper divisors (27778160).

28789648 is a wasteful number, since it uses less digits than its factorization.

28789648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25422 (or 25416 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 28789648 is about 5365.5985686594. The cubic root of 28789648 is about 306.4870424671.

The spelling of 28789648 in words is "twenty-eight million, seven hundred eighty-nine thousand, six hundred forty-eight".