522820 has 12 divisors (see below), whose sum is σ = 1097964. Its totient is φ = 209120.

The previous prime is 522811. The next prime is 522827. The reversal of 522820 is 28225.

It can be written as a sum of positive squares in 2 ways, for example, as 278784 + 244036 = 528^2 + 494^2 .

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (522827) by changing a digit.

522820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13051 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (91497).

2⁵²²⁸²⁰ is an apocalyptic number.

It is an amenable number.

522820 is an abundant number, since it is smaller than the sum of its proper divisors (575144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

522820 is a wasteful number, since it uses less digits than its factorization.

522820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26150 (or 26148 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 522820 is about 723.0629294882. The cubic root of 522820 is about 80.5596178865.

The spelling of 522820 in words is "five hundred twenty-two thousand, eight hundred twenty".