520344 has 80 divisors (see below), whose sum is σ = 1611720. Its totient is φ = 155520.

The previous prime is 520339. The next prime is 520349. The reversal of 520344 is 443025.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (520339) and next prime (520349).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520349) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7092 + ... + 7164.

2⁵²⁰³⁴⁴ is an apocalyptic number.

520344 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (805860).

520344 is an abundant number, since it is smaller than the sum of its proper divisors (1091376).

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

520344 is a wasteful number, since it uses less digits than its factorization.

520344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 520344 is about 721.3487367425. The cubic root of 520344 is about 80.4322436945.

Adding to 520344 its reverse (443025), we get a palindrome (963369).

The spelling of 520344 in words is "five hundred twenty thousand, three hundred forty-four".