528649 has 12 divisors (see below), whose sum is σ = 617652. Its totient is φ = 450560.

The previous prime is 528631. The next prime is 528659. The reversal of 528649 is 946825.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 480249 + 48400 = 693^2 + 220^2 .

It is not a de Polignac number, because 528649 - 2⁹ = 528137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (528629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1929 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (51471).

2⁵²⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

528649 is a deficient number, since it is larger than the sum of its proper divisors (89003).

528649 is a wasteful number, since it uses less digits than its factorization.

528649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 285 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 528649 is about 727.0825262651. The cubic root of 528649 is about 80.8579025703.

It can be divided in two parts, 5286 and 49, that added together give a palindrome (5335).

The spelling of 528649 in words is "five hundred twenty-eight thousand, six hundred forty-nine".