28216288 has 24 divisors (see below), whose sum is σ = 55693008. Its totient is φ = 14072064.

The previous prime is 28216283. The next prime is 28216291. The reversal of 28216288 is 88261282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28216283) 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 3 ways as a sum of consecutive naturals, for example, 15220 + ... + 16972.

It is an arithmetic number, because the mean of its divisors is an integer number (2320542).

Almost surely, 2^28216288 is an apocalyptic number.

It is an amenable number.

28216288 is a deficient number, since it is larger than the sum of its proper divisors (27476720).

28216288 is a wasteful number, since it uses less digits than its factorization.

28216288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266 (or 2258 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 28216288 is about 5311.9006014797. The cubic root of 28216288 is about 304.4387708385.

The spelling of 28216288 in words is "twenty-eight million, two hundred sixteen thousand, two hundred eighty-eight".