28320888 has 32 divisors (see below), whose sum is σ = 71125200. Its totient is φ = 9397248.

The previous prime is 28320883. The next prime is 28320893. The reversal of 28320888 is 88802382.

It is an interprime number because it is at equal distance from previous prime (28320883) and next prime (28320893).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28320881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920 + ... + 8072.

Almost surely, 2^28320888 is an apocalyptic number.

It is an amenable number.

28320888 is an abundant number, since it is smaller than the sum of its proper divisors (42804312).

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

28320888 is a wasteful number, since it uses less digits than its factorization.

28320888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391 (or 5387 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 28320888 is about 5321.7373103151. The cubic root of 28320888 is about 304.8144997614.

The spelling of 28320888 in words is "twenty-eight million, three hundred twenty thousand, eight hundred eighty-eight".