28528273 has 2 divisors, whose sum is σ = 28528274. Its totient is φ = 28528272.

The previous prime is 28528271. The next prime is 28528289. The reversal of 28528273 is 37282582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28227969 + 300304 = 5313^2 + 548^2 .

It is a cyclic number.

It is not a de Polignac number, because 28528273 - 2¹ = 28528271 is a prime.

Together with 28528271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28528271) 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 as a sum of consecutive naturals, namely, 14264136 + 14264137.

It is an arithmetic number, because the mean of its divisors is an integer number (14264137).

Almost surely, 2^28528273 is an apocalyptic number.

It is an amenable number.

28528273 is a deficient number, since it is larger than the sum of its proper divisors (1).

28528273 is an equidigital number, since it uses as much as digits as its factorization.

28528273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 37.

The square root of 28528273 is about 5341.1864786768. The cubic root of 28528273 is about 305.5567114349.

The spelling of 28528273 in words is "twenty-eight million, five hundred twenty-eight thousand, two hundred seventy-three".