28242304 has 32 divisors (see below), whose sum is σ = 59578200. Its totient is φ = 13289472.

The previous prime is 28242301. The next prime is 28242311. The reversal of 28242304 is 40324282.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28242301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4314 + ... + 8665.

Almost surely, 2^28242304 is an apocalyptic number.

It is an amenable number.

28242304 is an abundant number, since it is smaller than the sum of its proper divisors (31335896).

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

28242304 is a wasteful number, since it uses less digits than its factorization.

28242304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13010 (or 12998 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 28242304 is about 5314.3488782729. The cubic root of 28242304 is about 304.5323083736.

Adding to 28242304 its reverse (40324282), we get a palindrome (68566586).

The spelling of 28242304 in words is "twenty-eight million, two hundred forty-two thousand, three hundred four".