28608216 has 64 divisors (see below), whose sum is σ = 88032000. Its totient is φ = 7544448.

The previous prime is 28608211. The next prime is 28608221. The reversal of 28608216 is 61280682.

It is an interprime number because it is at equal distance from previous prime (28608211) and next prime (28608221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4366 + ... + 8733.

It is an arithmetic number, because the mean of its divisors is an integer number (1375500).

Almost surely, 2^28608216 is an apocalyptic number.

28608216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28608216 is an abundant number, since it is smaller than the sum of its proper divisors (59423784).

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

28608216 is a wasteful number, since it uses less digits than its factorization.

28608216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13128 (or 13124 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28608216 is about 5348.6648801360. The cubic root of 28608216 is about 305.8418594209.

Adding to 28608216 its reverse (61280682), we get a palindrome (89888898).

The spelling of 28608216 in words is "twenty-eight million, six hundred eight thousand, two hundred sixteen".