28587828 has 72 divisors (see below), whose sum is σ = 71845536. Its totient is φ = 8838720.

The previous prime is 28587817. The next prime is 28587847. The reversal of 28587828 is 82878582.

It is a happy number.

Its product of digits (573440) is a multiple of the sum of its prime divisors (140).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 426651 + ... + 426717.

Almost surely, 2^28587828 is an apocalyptic number.

It is an amenable number.

28587828 is an abundant number, since it is smaller than the sum of its proper divisors (43257708).

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

28587828 is a wasteful number, since it uses less digits than its factorization.

28587828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 140 counting only the distinct ones).

The product of its digits is 573440, while the sum is 48.

The square root of 28587828 is about 5346.7586442629. The cubic root of 28587828 is about 305.7691881565.

The spelling of 28587828 in words is "twenty-eight million, five hundred eighty-seven thousand, eight hundred twenty-eight".