28089824 has 48 divisors (see below), whose sum is σ = 63957600. Its totient is φ = 11894784.

The previous prime is 28089821. The next prime is 28089833. The reversal of 28089824 is 42898082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089821) by changing a digit.

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, 19232 + ... + 20640.

It is an arithmetic number, because the mean of its divisors is an integer number (1332450).

Almost surely, 2^28089824 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 28089824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31978800).

28089824 is an abundant number, since it is smaller than the sum of its proper divisors (35867776).

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

28089824 is a wasteful number, since it uses less digits than its factorization.

28089824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 28089824 is about 5299.9833962004. The cubic root of 28089824 is about 303.9832631598.

The spelling of 28089824 in words is "twenty-eight million, eighty-nine thousand, eight hundred twenty-four".