390520 has 32 divisors (see below), whose sum is σ = 947520. Its totient is φ = 144000.

The previous prime is 390503. The next prime is 390527. The reversal of 390520 is 25093.

390520 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.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (29610).

2³⁹⁰⁵²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473760).

390520 is an abundant number, since it is smaller than the sum of its proper divisors (557000).

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

390520 is a wasteful number, since it uses less digits than its factorization.

390520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 390520 is about 624.9159943544. The cubic root of 390520 is about 73.0938930686.

The spelling of 390520 in words is "three hundred ninety thousand, five hundred twenty".