28604288 has 32 divisors (see below), whose sum is σ = 58321560. Its totient is φ = 13966848.

The previous prime is 28604281. The next prime is 28604297. The reversal of 28604288 is 88240682.

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 (28604281) 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, 2906 + ... + 8102.

Almost surely, 2^28604288 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 28604288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29160780).

28604288 is an abundant number, since it is smaller than the sum of its proper divisors (29717272).

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

28604288 is an equidigital number, since it uses as much as digits as its factorization.

28604288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254 (or 5242 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 28604288 is about 5348.2976730919. The cubic root of 28604288 is about 305.8278610901.

The spelling of 28604288 in words is "twenty-eight million, six hundred four thousand, two hundred eighty-eight".