28328048 has 80 divisors (see below), whose sum is σ = 66662400. Its totient is φ = 11404800.

The previous prime is 28327979. The next prime is 28328063. The reversal of 28328048 is 84082382.

It is a junction number, because it is equal to n+sod(n) for n = 28327999 and 28328017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142253 + ... + 142451.

It is an arithmetic number, because the mean of its divisors is an integer number (833280).

Almost surely, 2^28328048 is an apocalyptic number.

28328048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28328048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33331200).

28328048 is an abundant number, since it is smaller than the sum of its proper divisors (38334352).

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

28328048 is a wasteful number, since it uses less digits than its factorization.

28328048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 28328048 is about 5322.4099804506. The cubic root of 28328048 is about 304.8401850192.

The spelling of 28328048 in words is "twenty-eight million, three hundred twenty-eight thousand, forty-eight".