520308 has 36 divisors (see below), whose sum is σ = 1337700. Its totient is φ = 170496.

The previous prime is 520307. The next prime is 520309. The reversal of 520308 is 803025.

It is an interprime number because it is at equal distance from previous prime (520307) and next prime (520309).

It can be written as a sum of positive squares in 2 ways, for example, as 138384 + 381924 = 372^2 + 618^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (520307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3418 + ... + 3566.

2⁵²⁰³⁰⁸ is an apocalyptic number.

It is an amenable number.

520308 is an abundant number, since it is smaller than the sum of its proper divisors (817392).

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

520308 is a wasteful number, since it uses less digits than its factorization.

520308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 520308 is about 721.3237830545. The cubic root of 520308 is about 80.4303887501.

It can be divided in two parts, 520 and 308, that added together give a palindrome (828).

The spelling of 520308 in words is "five hundred twenty thousand, three hundred eight".