28315268 has 12 divisors (see below), whose sum is σ = 52466652. Its totient is φ = 13324800.

The previous prime is 28315247. The next prime is 28315289. The reversal of 28315268 is 86251382.

It is an interprime number because it is at equal distance from previous prime (28315247) and next prime (28315289).

It can be written as a sum of positive squares in 2 ways, for example, as 18593344 + 9721924 = 4312^2 + 3118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208133 + ... + 208268.

It is an arithmetic number, because the mean of its divisors is an integer number (4372221).

Almost surely, 2^28315268 is an apocalyptic number.

It is an amenable number.

28315268 is a deficient number, since it is larger than the sum of its proper divisors (24151384).

28315268 is a wasteful number, since it uses less digits than its factorization.

28315268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416422 (or 416420 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 28315268 is about 5321.2092610609. The cubic root of 28315268 is about 304.7943359538.

It can be divided in two parts, 283 and 15268, that added together give a palindrome (15551).

The spelling of 28315268 in words is "twenty-eight million, three hundred fifteen thousand, two hundred sixty-eight".