28084812 has 48 divisors (see below), whose sum is σ = 78839040. Its totient is φ = 7601472.

The previous prime is 28084807. The next prime is 28084829. The reversal of 28084812 is 21848082.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7203 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (1642480).

Almost surely, 2^28084812 is an apocalyptic number.

It is an amenable number.

28084812 is an abundant number, since it is smaller than the sum of its proper divisors (50754228).

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

28084812 is a wasteful number, since it uses less digits than its factorization.

28084812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17630 (or 17628 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 28084812 is about 5299.5105434370. The cubic root of 28084812 is about 303.9651824159.

The spelling of 28084812 in words is "twenty-eight million, eighty-four thousand, eight hundred twelve".