28056548 has 24 divisors (see below), whose sum is σ = 53019960. Its totient is φ = 12913920.

The previous prime is 28056547. The next prime is 28056569. The reversal of 28056548 is 84565082.

It can be written as a sum of positive squares in 4 ways, for example, as 3771364 + 24285184 = 1942^2 + 4928^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28056541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36488 + ... + 37248.

It is an arithmetic number, because the mean of its divisors is an integer number (2209165).

Almost surely, 2^28056548 is an apocalyptic number.

It is an amenable number.

28056548 is a deficient number, since it is larger than the sum of its proper divisors (24963412).

28056548 is a wasteful number, since it uses less digits than its factorization.

28056548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 28056548 is about 5296.8432108191. The cubic root of 28056548 is about 303.8631800056.

The spelling of 28056548 in words is "twenty-eight million, fifty-six thousand, five hundred forty-eight".