390522 has 32 divisors (see below), whose sum is σ = 874944. Its totient is φ = 115200.

The previous prime is 390503. The next prime is 390527. The reversal of 390522 is 225093.

390522 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390527) by changing a digit.

390522 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3978 + ... + 4074.

It is an arithmetic number, because the mean of its divisors is an integer number (27342).

2³⁹⁰⁵²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437472).

390522 is an abundant number, since it is smaller than the sum of its proper divisors (484422).

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

390522 is a wasteful number, since it uses less digits than its factorization.

390522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 390522 is about 624.9175945675. The cubic root of 390522 is about 73.0940178489.

It can be divided in two parts, 3 and 90522, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 390522 in words is "three hundred ninety thousand, five hundred twenty-two".