28668608 has 28 divisors (see below), whose sum is σ = 57454800. Its totient is φ = 14191872.

The previous prime is 28668589. The next prime is 28668667. The reversal of 28668608 is 80686682.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4418 + ... + 8766.

Almost surely, 2^28668608 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 28668608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28727400).

28668608 is an abundant number, since it is smaller than the sum of its proper divisors (28786192).

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

28668608 is a wasteful number, since it uses less digits than its factorization.

28668608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 28668608 is about 5354.3074248683. The cubic root of 28668608 is about 306.0569190827.

It can be divided in two parts, 2 and 8668608, that multiplied together give a triangular number (17337216 = T₅₈₈₈).

The spelling of 28668608 in words is "twenty-eight million, six hundred sixty-eight thousand, six hundred eight".