520340 has 12 divisors (see below), whose sum is σ = 1092756. Its totient is φ = 208128.

The previous prime is 520339. The next prime is 520349. The reversal of 520340 is 43025.

It can be written as a sum of positive squares in 2 ways, for example, as 293764 + 226576 = 542^2 + 476^2 .

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 12989 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (91063).

2⁵²⁰³⁴⁰ is an apocalyptic number.

It is an amenable number.

520340 is an abundant number, since it is smaller than the sum of its proper divisors (572416).

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

520340 is a wasteful number, since it uses less digits than its factorization.

520340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26026 (or 26024 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 520340 is about 721.3459641531. The cubic root of 520340 is about 80.4320375938.

Adding to 520340 its reverse (43025), we get a palindrome (563365).

The spelling of 520340 in words is "five hundred twenty thousand, three hundred forty".