520290 has 64 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 132480.

The previous prime is 520279. The next prime is 520291. The reversal of 520290 is 92025.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520291) by changing a digit.

520290 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11047 + ... + 11093.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁵²⁰²⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725760).

520290 is an abundant number, since it is smaller than the sum of its proper divisors (931230).

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

520290 is a wasteful number, since it uses less digits than its factorization.

520290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 520290 is about 721.3113058867. The cubic root of 520290 is about 80.4294612459.

The spelling of 520290 in words is "five hundred twenty thousand, two hundred ninety".