28224516 has 12 divisors (see below), whose sum is σ = 65857232. Its totient is φ = 9408168.

The previous prime is 28224433. The next prime is 28224529. The reversal of 28224516 is 61542282.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 1176010 + ... + 1176033.

Almost surely, 2^28224516 is an apocalyptic number.

It is an amenable number.

28224516 is an abundant number, since it is smaller than the sum of its proper divisors (37632716).

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

28224516 is a wasteful number, since it uses less digits than its factorization.

28224516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352050 (or 2352048 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 28224516 is about 5312.6750324107. The cubic root of 28224516 is about 304.4683598801.

Adding to 28224516 its reverse (61542282), we get a palindrome (89766798).

The spelling of 28224516 in words is "twenty-eight million, two hundred twenty-four thousand, five hundred sixteen".