28504384 has 28 divisors (see below), whose sum is σ = 56816244. Its totient is φ = 14188544.

The previous prime is 28504379. The next prime is 28504387. The reversal of 28504384 is 48340582.

It can be written as a sum of positive squares in 2 ways, for example, as 22353984 + 6150400 = 4728^2 + 2480^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28504387) 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, 15582 + ... + 17314.

Almost surely, 2^28504384 is an apocalyptic number.

It is an amenable number.

28504384 is a deficient number, since it is larger than the sum of its proper divisors (28311860).

28504384 is a wasteful number, since it uses less digits than its factorization.

28504384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28504384 is about 5338.9497094466. The cubic root of 28504384 is about 305.4713986097.

The spelling of 28504384 in words is "twenty-eight million, five hundred four thousand, three hundred eighty-four".