28315325 has 12 divisors (see below), whose sum is σ = 35268948. Its totient is φ = 22550400.

The previous prime is 28315289. The next prime is 28315327. The reversal of 28315325 is 52351382.

It can be written as a sum of positive squares in 6 ways, for example, as 76729 + 28238596 = 277^2 + 5314^2 .

It is not a de Polignac number, because 28315325 - 2⁸ = 28315069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315327) 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 11 ways as a sum of consecutive naturals, for example, 3395 + ... + 8255.

It is an arithmetic number, because the mean of its divisors is an integer number (2939079).

Almost surely, 2^28315325 is an apocalyptic number.

28315325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28315325 is a deficient number, since it is larger than the sum of its proper divisors (6953623).

28315325 is a wasteful number, since it uses less digits than its factorization.

28315325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104 (or 5099 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 28315325 is about 5321.2146169836. The cubic root of 28315325 is about 304.7945404756.

The spelling of 28315325 in words is "twenty-eight million, three hundred fifteen thousand, three hundred twenty-five".