28420048 has 20 divisors (see below), whose sum is σ = 57962560. Its totient is φ = 13461984.

The previous prime is 28420037. The next prime is 28420081. The reversal of 28420048 is 84002482.

It is a junction number, because it is equal to n+sod(n) for n = 28419998 and 28420025.

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, 46440 + ... + 47047.

It is an arithmetic number, because the mean of its divisors is an integer number (2898128).

Almost surely, 2^28420048 is an apocalyptic number.

It is an amenable number.

28420048 is an abundant number, since it is smaller than the sum of its proper divisors (29542512).

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

28420048 is a wasteful number, since it uses less digits than its factorization.

28420048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93514 (or 93508 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 28420048 is about 5331.0456760377. The cubic root of 28420048 is about 305.1698346431.

The spelling of 28420048 in words is "twenty-eight million, four hundred twenty thousand, forty-eight".