28332304 has 160 divisors (see below), whose sum is σ = 77495040. Its totient is φ = 9676800.

The previous prime is 28332289. The next prime is 28332329. The reversal of 28332304 is 40323382.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464434 + ... + 464494.

It is an arithmetic number, because the mean of its divisors is an integer number (484344).

Almost surely, 2^28332304 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 28332304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38747520).

28332304 is an abundant number, since it is smaller than the sum of its proper divisors (49162736).

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

28332304 is a wasteful number, since it uses less digits than its factorization.

28332304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 28332304 is about 5322.8097843150. The cubic root of 28332304 is about 304.8554506299.

Adding to 28332304 its reverse (40323382), we get a palindrome (68655686).

The spelling of 28332304 in words is "twenty-eight million, three hundred thirty-two thousand, three hundred four".