28089132 has 24 divisors (see below), whose sum is σ = 65705472. Its totient is φ = 9339600.

The previous prime is 28089121. The next prime is 28089169. The reversal of 28089132 is 23198082.

It is a junction number, because it is equal to n+sod(n) for n = 28089093 and 28089102.

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 7 ways as a sum of consecutive naturals, for example, 2457 + ... + 7887.

It is an arithmetic number, because the mean of its divisors is an integer number (2737728).

Almost surely, 2^28089132 is an apocalyptic number.

It is an amenable number.

28089132 is an abundant number, since it is smaller than the sum of its proper divisors (37616340).

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

28089132 is a wasteful number, since it uses less digits than its factorization.

28089132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28089132 is about 5299.9181125749. The cubic root of 28089132 is about 303.9807669042.

The spelling of 28089132 in words is "twenty-eight million, eighty-nine thousand, one hundred thirty-two".