28684529 has 2 divisors, whose sum is σ = 28684530. Its totient is φ = 28684528.

The previous prime is 28684511. The next prime is 28684553. The reversal of 28684529 is 92548682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 8254129 = 4520^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 28684529 - 2¹² = 28680433 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28684529.

It is not a weakly prime, because it can be changed into another prime (28684829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14342264 + 14342265.

It is an arithmetic number, because the mean of its divisors is an integer number (14342265).

Almost surely, 2^28684529 is an apocalyptic number.

It is an amenable number.

28684529 is a deficient number, since it is larger than the sum of its proper divisors (1).

28684529 is an equidigital number, since it uses as much as digits as its factorization.

28684529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 28684529 is about 5355.7939654173. The cubic root of 28684529 is about 306.1135644382.

The spelling of 28684529 in words is "twenty-eight million, six hundred eighty-four thousand, five hundred twenty-nine".