28984 has 8 divisors (see below), whose sum is σ = 54360. Its totient is φ = 14488.

The previous prime is 28979. The next prime is 29009. The reversal of 28984 is 48982.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

28984 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1804 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (6795).

2²⁸⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

28984 is a deficient number, since it is larger than the sum of its proper divisors (25376).

28984 is a wasteful number, since it uses less digits than its factorization.

28984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629 (or 3625 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 28984 is about 170.2468795602. The cubic root of 28984 is about 30.7175169796.

It can be divided in two parts, 289 and 84, that added together give a palindrome (373).

The spelling of 28984 in words is "twenty-eight thousand, nine hundred eighty-four".