28224412 has 12 divisors (see below), whose sum is σ = 49550760. Its totient is φ = 14067056.

The previous prime is 28224407. The next prime is 28224421. The reversal of 28224412 is 21442282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9862 + ... + 12397.

It is an arithmetic number, because the mean of its divisors is an integer number (4129230).

Almost surely, 2^28224412 is an apocalyptic number.

It is an amenable number.

28224412 is a deficient number, since it is larger than the sum of its proper divisors (21326348).

28224412 is a wasteful number, since it uses less digits than its factorization.

28224412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22580 (or 22578 counting only the distinct ones).

The product of its digits is 2048, while the sum is 25.

The square root of 28224412 is about 5312.6652444889. The cubic root of 28224412 is about 304.4679859174.

Adding to 28224412 its reverse (21442282), we get a palindrome (49666694).

The spelling of 28224412 in words is "twenty-eight million, two hundred twenty-four thousand, four hundred twelve".