520744 has 32 divisors (see below), whose sum is σ = 1183680. Its totient is φ = 209664.

The previous prime is 520721. The next prime is 520747. The reversal of 520744 is 447025.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (520747) by changing a digit.

520744 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 7 ways as a sum of consecutive naturals, for example, 679 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (36990).

2⁵²⁰⁷⁴⁴ 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 520744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591840).

520744 is an abundant number, since it is smaller than the sum of its proper divisors (662936).

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

520744 is a wasteful number, since it uses less digits than its factorization.

520744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 520744 is about 721.6259418840. The cubic root of 520744 is about 80.4528484336.

Adding to 520744 its reverse (447025), we get a palindrome (967769).

The spelling of 520744 in words is "five hundred twenty thousand, seven hundred forty-four".