28328548 has 12 divisors (see below), whose sum is σ = 51730560. Its totient is φ = 13548392.

The previous prime is 28328543. The next prime is 28328551. The reversal of 28328548 is 84582382.

It is a self number, because there is not a number n which added to its sum of digits gives 28328548.

It is not an unprimeable number, because it can be changed into a prime (28328543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153868 + ... + 154051.

It is an arithmetic number, because the mean of its divisors is an integer number (4310880).

Almost surely, 2^28328548 is an apocalyptic number.

It is an amenable number.

28328548 is a deficient number, since it is larger than the sum of its proper divisors (23402012).

28328548 is a wasteful number, since it uses less digits than its factorization.

28328548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307946 (or 307944 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 28328548 is about 5322.4569514464. The cubic root of 28328548 is about 304.8419785207.

The spelling of 28328548 in words is "twenty-eight million, three hundred twenty-eight thousand, five hundred forty-eight".