522990 has 64 divisors (see below), whose sum is σ = 1512000. Its totient is φ = 127872.

The previous prime is 522989. The next prime is 523007. The reversal of 522990 is 99225.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3436 + ... + 3584.

It is an arithmetic number, because the mean of its divisors is an integer number (23625).

2⁵²²⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756000).

522990 is an abundant number, since it is smaller than the sum of its proper divisors (989010).

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

522990 is a wasteful number, since it uses less digits than its factorization.

522990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 522990 is about 723.1804754002. The cubic root of 522990 is about 80.5683485209.

The spelling of 522990 in words is "five hundred twenty-two thousand, nine hundred ninety".