28684384 has 24 divisors (see below), whose sum is σ = 57433320. Its totient is φ = 14098176.

The previous prime is 28684363. The next prime is 28684387. The reversal of 28684384 is 48348682.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28684384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28684387) 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, 5709 + ... + 9484.

It is an arithmetic number, because the mean of its divisors is an integer number (2393055).

Almost surely, 2^28684384 is an apocalyptic number.

It is an amenable number.

28684384 is an abundant number, since it is smaller than the sum of its proper divisors (28748936).

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

28684384 is a wasteful number, since it uses less digits than its factorization.

28684384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15262 (or 15254 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 28684384 is about 5355.7804286584. The cubic root of 28684384 is about 306.1130486370.

The spelling of 28684384 in words is "twenty-eight million, six hundred eighty-four thousand, three hundred eighty-four".