28182325 has 12 divisors (see below), whose sum is σ = 35023428. Its totient is φ = 22496000.

The previous prime is 28182247. The next prime is 28182367. The reversal of 28182325 is 52328182.

It can be written as a sum of positive squares in 6 ways, for example, as 2961841 + 25220484 = 1721^2 + 5022^2 .

It is not a de Polignac number, because 28182325 - 2¹⁵ = 28149557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 13875 + ... + 15775.

It is an arithmetic number, because the mean of its divisors is an integer number (2918619).

Almost surely, 2^28182325 is an apocalyptic number.

28182325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28182325 is a deficient number, since it is larger than the sum of its proper divisors (6841103).

28182325 is a wasteful number, since it uses less digits than its factorization.

28182325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504 (or 2499 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 28182325 is about 5308.7027605621. The cubic root of 28182325 is about 304.3165742163.

The spelling of 28182325 in words is "twenty-eight million, one hundred eighty-two thousand, three hundred twenty-five".