522690 has 64 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 112320.

The previous prime is 522689. The next prime is 522703. The reversal of 522690 is 96225.

522690 = T₂₂₅ + T₂₂₆ + ... + T₂₄₃.

It is a super-2 number, since 2×522690² = 546409672200, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 522690.

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, 3925 + ... + 4055.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2⁵²²⁶⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760320).

522690 is an abundant number, since it is smaller than the sum of its proper divisors (997950).

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

522690 is a wasteful number, since it uses less digits than its factorization.

522690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 522690 is about 722.9730285426. The cubic root of 522690 is about 80.5529402419.

The spelling of 522690 in words is "five hundred twenty-two thousand, six hundred ninety".