28088872 has 32 divisors (see below), whose sum is σ = 60822720. Its totient is φ = 11911680.

The previous prime is 28088861. The next prime is 28088903. The reversal of 28088872 is 27888082.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2847 + ... + 8017.

It is an arithmetic number, because the mean of its divisors is an integer number (1900710).

Almost surely, 2^28088872 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 28088872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30411360).

28088872 is an abundant number, since it is smaller than the sum of its proper divisors (32733848).

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

28088872 is a wasteful number, since it uses less digits than its factorization.

28088872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281 (or 5277 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 43.

The square root of 28088872 is about 5299.8935838373. The cubic root of 28088872 is about 303.9798289941.

The spelling of 28088872 in words is "twenty-eight million, eighty-eight thousand, eight hundred seventy-two".