28285648 has 20 divisors (see below), whose sum is σ = 54941920. Its totient is φ = 14107104.

The previous prime is 28285601. The next prime is 28285657. The reversal of 28285648 is 84658282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5011 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (2747096).

Almost surely, 2^28285648 is an apocalyptic number.

It is an amenable number.

28285648 is a deficient number, since it is larger than the sum of its proper divisors (26656272).

28285648 is a wasteful number, since it uses less digits than its factorization.

28285648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474 (or 4468 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 28285648 is about 5318.4253308663. The cubic root of 28285648 is about 304.6880192479.

The spelling of 28285648 in words is "twenty-eight million, two hundred eighty-five thousand, six hundred forty-eight".