28173648 has 20 divisors (see below), whose sum is σ = 72782048. Its totient is φ = 9391200.

The previous prime is 28173631. The next prime is 28173667. The reversal of 28173648 is 84637182.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 293428 + ... + 293523.

Almost surely, 2^28173648 is an apocalyptic number.

It is an amenable number.

28173648 is an abundant number, since it is smaller than the sum of its proper divisors (44608400).

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

28173648 is a wasteful number, since it uses less digits than its factorization.

28173648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586962 (or 586956 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 28173648 is about 5307.8854546797. The cubic root of 28173648 is about 304.2853392022.

The spelling of 28173648 in words is "twenty-eight million, one hundred seventy-three thousand, six hundred forty-eight".