28650216 has 32 divisors (see below), whose sum is σ = 81858240. Its totient is φ = 8185728.

The previous prime is 28650199. The next prime is 28650217. The reversal of 28650216 is 61205682.

It is not an unprimeable number, because it can be changed into a prime (28650217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 85101 + ... + 85436.

It is an arithmetic number, because the mean of its divisors is an integer number (2558070).

Almost surely, 2^28650216 is an apocalyptic number.

It is an amenable number.

28650216 is an abundant number, since it is smaller than the sum of its proper divisors (53208024).

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

28650216 is a wasteful number, since it uses less digits than its factorization.

28650216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170553 (or 170549 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28650216 is about 5352.5896536163. The cubic root of 28650216 is about 305.9914560389.

Adding to 28650216 its reverse (61205682), we get a palindrome (89855898).

The spelling of 28650216 in words is "twenty-eight million, six hundred fifty thousand, two hundred sixteen".