28716212 has 12 divisors (see below), whose sum is σ = 57432480. Its totient is φ = 12306936.

The previous prime is 28716209. The next prime is 28716221. The reversal of 28716212 is 21261782.

28716212 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 512762 + ... + 512817.

It is an arithmetic number, because the mean of its divisors is an integer number (4786040).

Almost surely, 2^28716212 is an apocalyptic number.

It is an amenable number.

28716212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28716212 is a wasteful number, since it uses less digits than its factorization.

28716212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025590 (or 1025588 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 28716212 is about 5358.7509738744. The cubic root of 28716212 is about 306.2262271148.

Adding to 28716212 its reverse (21261782), we get a palindrome (49977994).

The spelling of 28716212 in words is "twenty-eight million, seven hundred sixteen thousand, two hundred twelve".