28587252 has 24 divisors (see below), whose sum is σ = 69604416. Its totient is φ = 9114688.

The previous prime is 28587203. The next prime is 28587253. The reversal of 28587252 is 25278582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28587252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28587253) 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 in 7 ways as a sum of consecutive naturals, for example, 51513 + ... + 52064.

It is an arithmetic number, because the mean of its divisors is an integer number (2900184).

Almost surely, 2^28587252 is an apocalyptic number.

It is an amenable number.

28587252 is an abundant number, since it is smaller than the sum of its proper divisors (41017164).

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

28587252 is a wasteful number, since it uses less digits than its factorization.

28587252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103607 (or 103605 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 28587252 is about 5346.7047795815. The cubic root of 28587252 is about 305.7671345525.

The spelling of 28587252 in words is "twenty-eight million, five hundred eighty-seven thousand, two hundred fifty-two".