28361584 has 20 divisors (see below), whose sum is σ = 55853320. Its totient is φ = 13947840.

The previous prime is 28361563. The next prime is 28361587. The reversal of 28361584 is 48516382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28361587) 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, 13554 + ... + 15505.

It is an arithmetic number, because the mean of its divisors is an integer number (2792666).

Almost surely, 2^28361584 is an apocalyptic number.

It is an amenable number.

28361584 is a deficient number, since it is larger than the sum of its proper divisors (27491736).

28361584 is a wasteful number, since it uses less digits than its factorization.

28361584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29128 (or 29122 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 28361584 is about 5325.5595011229. The cubic root of 28361584 is about 304.9604320255.

The spelling of 28361584 in words is "twenty-eight million, three hundred sixty-one thousand, five hundred eighty-four".