28608215 has 16 divisors (see below), whose sum is σ = 35868960. Its totient is φ = 21882240.

The previous prime is 28608211. The next prime is 28608221. The reversal of 28608215 is 51280682.

It is not a de Polignac number, because 28608215 - 2² = 28608211 is a prime.

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, 9605 + ... + 12225.

It is an arithmetic number, because the mean of its divisors is an integer number (2241810).

Almost surely, 2^28608215 is an apocalyptic number.

28608215 is a deficient number, since it is larger than the sum of its proper divisors (7260745).

28608215 is a wasteful number, since it uses less digits than its factorization.

28608215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28608215 is about 5348.6647866547. The cubic root of 28608215 is about 305.8418558573.

Adding to 28608215 its reverse (51280682), we get a palindrome (79888897).

The spelling of 28608215 in words is "twenty-eight million, six hundred eight thousand, two hundred fifteen".