28088886 has 32 divisors (see below), whose sum is σ = 64366848. Its totient is φ = 8004960.

The previous prime is 28088861. The next prime is 28088903. The reversal of 28088886 is 68888082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25201 + ... + 26291.

It is an arithmetic number, because the mean of its divisors is an integer number (2011464).

Almost surely, 2^28088886 is an apocalyptic number.

28088886 is an abundant number, since it is smaller than the sum of its proper divisors (36277962).

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

28088886 is a wasteful number, since it uses less digits than its factorization.

28088886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its (nonzero) digits is 393216, while the sum is 48.

The square root of 28088886 is about 5299.8949046184. The cubic root of 28088886 is about 303.9798794971.

The spelling of 28088886 in words is "twenty-eight million, eighty-eight thousand, eight hundred eighty-six".