28604216 has 16 divisors (see below), whose sum is σ = 54126600. Its totient is φ = 14170464.

The previous prime is 28604209. The next prime is 28604221. The reversal of 28604216 is 61240682.

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, 15530 + ... + 17273.

Almost surely, 2^28604216 is an apocalyptic number.

It is an amenable number.

28604216 is a deficient number, since it is larger than the sum of its proper divisors (25522384).

28604216 is a wasteful number, since it uses less digits than its factorization.

28604216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32918 (or 32914 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28604216 is about 5348.2909419739. The cubic root of 28604216 is about 305.8276044896.

Adding to 28604216 its reverse (61240682), we get a palindrome (89844898).

The spelling of 28604216 in words is "twenty-eight million, six hundred four thousand, two hundred sixteen".