28504252 has 24 divisors (see below), whose sum is σ = 58849280. Its totient is φ = 11821680.

The previous prime is 28504249. The next prime is 28504253. The reversal of 28504252 is 25240582.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 28504252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28504253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15552 + ... + 17287.

Almost surely, 2^28504252 is an apocalyptic number.

It is an amenable number.

28504252 is an abundant number, since it is smaller than the sum of its proper divisors (30345028).

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

28504252 is a wasteful number, since it uses less digits than its factorization.

28504252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32881 (or 32879 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28504252 is about 5338.9373474503. The cubic root of 28504252 is about 305.4709270766.

The spelling of 28504252 in words is "twenty-eight million, five hundred four thousand, two hundred fifty-two".