28320048 has 60 divisors (see below), whose sum is σ = 79745640. Its totient is φ = 9381888.

The previous prime is 28320041. The next prime is 28320091. The reversal of 28320048 is 84002382.

It is not an unprimeable number, because it can be changed into a prime (28320041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27283 + ... + 28301.

It is an arithmetic number, because the mean of its divisors is an integer number (1329094).

Almost surely, 2^28320048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28320048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39872820).

28320048 is an abundant number, since it is smaller than the sum of its proper divisors (51425592).

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

28320048 is a wasteful number, since it uses less digits than its factorization.

28320048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28320048 is about 5321.6583881343. The cubic root of 28320048 is about 304.8114861235.

The spelling of 28320048 in words is "twenty-eight million, three hundred twenty thousand, forty-eight".