28581484 has 12 divisors (see below), whose sum is σ = 50214024. Its totient is φ = 14234624.

The previous prime is 28581481. The next prime is 28581493. The reversal of 28581484 is 48418582.

It is not an unprimeable number, because it can be changed into a prime (28581481) 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 3 ways as a sum of consecutive naturals, for example, 12874 + ... + 14929.

It is an arithmetic number, because the mean of its divisors is an integer number (4184502).

Almost surely, 2^28581484 is an apocalyptic number.

It is an amenable number.

28581484 is a deficient number, since it is larger than the sum of its proper divisors (21632540).

28581484 is a wasteful number, since it uses less digits than its factorization.

28581484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28064 (or 28062 counting only the distinct ones).

The product of its digits is 81920, while the sum is 40.

The square root of 28581484 is about 5346.1653547192. The cubic root of 28581484 is about 305.7465684687.

The spelling of 28581484 in words is "twenty-eight million, five hundred eighty-one thousand, four hundred eighty-four".