28288272 has 40 divisors (see below), whose sum is σ = 77378976. Its totient is φ = 8874496.

The previous prime is 28288261. The next prime is 28288291. The reversal of 28288272 is 27288282.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28288272.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16518 + ... + 18149.

Almost surely, 2^28288272 is an apocalyptic number.

It is an amenable number.

28288272 is an abundant number, since it is smaller than the sum of its proper divisors (49090704).

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

28288272 is a wasteful number, since it uses less digits than its factorization.

28288272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34695 (or 34689 counting only the distinct ones).

The product of its digits is 57344, while the sum is 39.

The square root of 28288272 is about 5318.6720147044. The cubic root of 28288272 is about 304.6974407118.

The spelling of 28288272 in words is "twenty-eight million, two hundred eighty-eight thousand, two hundred seventy-two".