28506529 has 2 divisors, whose sum is σ = 28506530. Its totient is φ = 28506528.

The previous prime is 28506523. The next prime is 28506553. The reversal of 28506529 is 92560582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28376929 + 129600 = 5327^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 28506529 - 2⁵ = 28506497 is a prime.

It is not a weakly prime, because it can be changed into another prime (28506523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14253264 + 14253265.

It is an arithmetic number, because the mean of its divisors is an integer number (14253265).

Almost surely, 2^28506529 is an apocalyptic number.

It is an amenable number.

28506529 is a deficient number, since it is larger than the sum of its proper divisors (1).

28506529 is an equidigital number, since it uses as much as digits as its factorization.

28506529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 28506529 is about 5339.1505878744. The cubic root of 28506529 is about 305.4790608196.

The spelling of 28506529 in words is "twenty-eight million, five hundred six thousand, five hundred twenty-nine".