28581088 has 24 divisors (see below), whose sum is σ = 58717008. Its totient is φ = 13668864.

The previous prime is 28581083. The next prime is 28581089. The reversal of 28581088 is 88018582.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28581088.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28581083) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18681 + ... + 20152.

It is an arithmetic number, because the mean of its divisors is an integer number (2446542).

Almost surely, 2^28581088 is an apocalyptic number.

It is an amenable number.

28581088 is an abundant number, since it is smaller than the sum of its proper divisors (30135920).

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

28581088 is a wasteful number, since it uses less digits than its factorization.

28581088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38866 (or 38858 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 28581088 is about 5346.1283186994. The cubic root of 28581088 is about 305.7451564100.

The spelling of 28581088 in words is "twenty-eight million, five hundred eighty-one thousand, eighty-eight".