28668888 has 48 divisors (see below), whose sum is σ = 77957880. Its totient is φ = 9517824.

The previous prime is 28668859. The next prime is 28668931. The reversal of 28668888 is 88886682.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21456 + ... + 22752.

Almost surely, 2^28668888 is an apocalyptic number.

It is an amenable number.

28668888 is an abundant number, since it is smaller than the sum of its proper divisors (49288992).

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

28668888 is a wasteful number, since it uses less digits than its factorization.

28668888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616 (or 1609 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 54.

The square root of 28668888 is about 5354.3335719770. Note that the first 3 decimals coincide. The cubic root of 28668888 is about 306.0579154764.

The spelling of 28668888 in words is "twenty-eight million, six hundred sixty-eight thousand, eight hundred eighty-eight".