28508648 has 32 divisors (see below), whose sum is σ = 62745600. Its totient is φ = 11886912.

The previous prime is 28508629. The next prime is 28508663. The reversal of 28508648 is 84680582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4808 + ... + 8951.

It is an arithmetic number, because the mean of its divisors is an integer number (1960800).

Almost surely, 2^28508648 is an apocalyptic number.

28508648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28508648 is an abundant number, since it is smaller than the sum of its proper divisors (34236952).

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

28508648 is a wasteful number, since it uses less digits than its factorization.

28508648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13809 (or 13805 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 28508648 is about 5339.3490239916. The cubic root of 28508648 is about 305.4866297768.

The spelling of 28508648 in words is "twenty-eight million, five hundred eight thousand, six hundred forty-eight".