520736 has 12 divisors (see below), whose sum is σ = 1025262. Its totient is φ = 260352.

The previous prime is 520721. The next prime is 520747. The reversal of 520736 is 637025.

It can be written as a sum of positive squares in only one way, i.e., 309136 + 211600 = 556^2 + 460^2 .

It is a super-3 number, since 3×520736³ = 423617665933344768, which contains 333 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520736.

It is an unprimeable number.

520736 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 as a sum of consecutive naturals, namely, 8105 + ... + 8168.

2⁵²⁰⁷³⁶ is an apocalyptic number.

It is an amenable number.

520736 is a deficient number, since it is larger than the sum of its proper divisors (504526).

520736 is a wasteful number, since it uses less digits than its factorization.

520736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16283 (or 16275 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 520736 is about 721.6203988248. The cubic root of 520736 is about 80.4524364422.

The spelling of 520736 in words is "five hundred twenty thousand, seven hundred thirty-six".