28078548 has 12 divisors (see below), whose sum is σ = 65516640. Its totient is φ = 9359512.

The previous prime is 28078541. The next prime is 28078549. The reversal of 28078548 is 84587082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078541) 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 3 ways as a sum of consecutive naturals, for example, 1169928 + ... + 1169951.

It is an arithmetic number, because the mean of its divisors is an integer number (5459720).

Almost surely, 2^28078548 is an apocalyptic number.

It is an amenable number.

28078548 is an abundant number, since it is smaller than the sum of its proper divisors (37438092).

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

28078548 is a wasteful number, since it uses less digits than its factorization.

28078548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339886 (or 2339884 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 28078548 is about 5298.9195125044. The cubic root of 28078548 is about 303.9425820691.

The spelling of 28078548 in words is "twenty-eight million, seventy-eight thousand, five hundred forty-eight".