28163055 has 16 divisors (see below), whose sum is σ = 45128160. Its totient is φ = 14997888.

The previous prime is 28163053. The next prime is 28163081. The reversal of 28163055 is 55036182.

It is not a de Polignac number, because 28163055 - 2¹ = 28163053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15789 + ... + 17481.

It is an arithmetic number, because the mean of its divisors is an integer number (2820510).

Almost surely, 2^28163055 is an apocalyptic number.

28163055 is a deficient number, since it is larger than the sum of its proper divisors (16965105).

28163055 is a wasteful number, since it uses less digits than its factorization.

28163055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 28163055 is about 5306.8875058739. The cubic root of 28163055 is about 304.2471983757.

It can be divided in two parts, 281 and 63055, that added together give a palindrome (63336).

The spelling of 28163055 in words is "twenty-eight million, one hundred sixty-three thousand, fifty-five".