528686825 has 12 divisors (see below), whose sum is σ = 694135260. Its totient is φ = 398069760.

The previous prime is 528686801. The next prime is 528686857.

528686825 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 6 ways, for example, as 22391824 + 506295001 = 4732^2 + 22501^2 .

It is not a de Polignac number, because 528686825 - 2²⁰ = 527638249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 621560 + ... + 622409.

It is an arithmetic number, because the mean of its divisors is an integer number (57844605).

Almost surely, 2^528686825 is an apocalyptic number.

It is an amenable number.

528686825 is a deficient number, since it is larger than the sum of its proper divisors (165448435).

528686825 is a wasteful number, since it uses less digits than its factorization.

528686825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243996 (or 1243991 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 50.

The square root of 528686825 is about 22993.1908398987. The cubic root of 528686825 is about 808.5983099364.

The spelling of 528686825 in words is "five hundred twenty-eight million, six hundred eighty-six thousand, eight hundred twenty-five".