522408 has 16 divisors (see below), whose sum is σ = 1306080. Its totient is φ = 174128.

The previous prime is 522391. The next prime is 522409. The reversal of 522408 is 804225.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 522408.

It is not an unprimeable number, because it can be changed into a prime (522409) by changing a digit.

522408 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, 10860 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (81630).

2⁵²²⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

522408 is an abundant number, since it is smaller than the sum of its proper divisors (783672).

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

522408 is a wasteful number, since it uses less digits than its factorization.

522408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21776 (or 21772 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 522408 is about 722.7779742078. Note that the first 3 decimals coincide. The cubic root of 522408 is about 80.5384510828.

The spelling of 522408 in words is "five hundred twenty-two thousand, four hundred eight".