28248688 has 60 divisors (see below), whose sum is σ = 61359168. Its totient is φ = 12579840.

The previous prime is 28248683. The next prime is 28248691. The reversal of 28248688 is 88684282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28248683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83656 + ... + 83992.

Almost surely, 2^28248688 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 28248688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30679584).

28248688 is an abundant number, since it is smaller than the sum of its proper divisors (33110480).

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

28248688 is a wasteful number, since it uses less digits than its factorization.

28248688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 383 counting only the distinct ones).

The product of its digits is 393216, while the sum is 46.

The square root of 28248688 is about 5314.9494823563. The cubic root of 28248688 is about 304.5552525331. Note that the first 3 decimals are identical.

The spelling of 28248688 in words is "twenty-eight million, two hundred forty-eight thousand, six hundred eighty-eight".