28124984 has 8 divisors (see below), whose sum is σ = 52734360. Its totient is φ = 14062488.

The previous prime is 28124981. The next prime is 28124989. The reversal of 28124984 is 48942182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28124981) 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 as a sum of consecutive naturals, namely, 1757804 + ... + 1757819.

It is an arithmetic number, because the mean of its divisors is an integer number (6591795).

Almost surely, 2^28124984 is an apocalyptic number.

It is an amenable number.

28124984 is a deficient number, since it is larger than the sum of its proper divisors (24609376).

28124984 is a wasteful number, since it uses less digits than its factorization.

28124984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515629 (or 3515625 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 28124984 is about 5303.2993504044. The cubic root of 28124984 is about 304.1100421104.

The spelling of 28124984 in words is "twenty-eight million, one hundred twenty-four thousand, nine hundred eighty-four".