28820529 has 12 divisors (see below), whose sum is σ = 43171856. Its totient is φ = 19213524.

The previous prime is 28820527. The next prime is 28820531. The reversal of 28820529 is 92502882.

It is an interprime number because it is at equal distance from previous prime (28820527) and next prime (28820531).

It is not a de Polignac number, because 28820529 - 2¹ = 28820527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28820493 and 28820502.

It is not an unprimeable number, because it can be changed into a prime (28820527) 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 11 ways as a sum of consecutive naturals, for example, 59059 + ... + 59544.

Almost surely, 2^28820529 is an apocalyptic number.

It is an amenable number.

28820529 is a deficient number, since it is larger than the sum of its proper divisors (14351327).

28820529 is an equidigital number, since it uses as much as digits as its factorization.

28820529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118618 (or 118606 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28820529 is about 5368.4754819222. The cubic root of 28820529 is about 306.5965869849.

The spelling of 28820529 in words is "twenty-eight million, eight hundred twenty thousand, five hundred twenty-nine".