28522773 has 10 divisors (see below), whose sum is σ = 42608214. Its totient is φ = 19015128.

The previous prime is 28522733. The next prime is 28522789. The reversal of 28522773 is 37722582.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28483569 + 39204 = 5337^2 + 198^2 .

It is not a de Polignac number, because 28522773 - 2⁸ = 28522517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28522733) 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 9 ways as a sum of consecutive naturals, for example, 175986 + ... + 176147.

Almost surely, 2^28522773 is an apocalyptic number.

It is an amenable number.

28522773 is a deficient number, since it is larger than the sum of its proper divisors (14085441).

28522773 is an equidigital number, since it uses as much as digits as its factorization.

28522773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352145 (or 352136 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 28522773 is about 5340.6715869823. The cubic root of 28522773 is about 305.5370739578.

It can be divided in two parts, 2852 and 2773, that added together give a square (5625 = 75²).

The spelling of 28522773 in words is "twenty-eight million, five hundred twenty-two thousand, seven hundred seventy-three".