520636 has 12 divisors (see below), whose sum is σ = 924112. Its totient is φ = 256608.

The previous prime is 520633. The next prime is 520649. The reversal of 520636 is 636025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600 + ... + 1183.

2⁵²⁰⁶³⁶ is an apocalyptic number.

It is an amenable number.

520636 is a deficient number, since it is larger than the sum of its proper divisors (403476).

520636 is a wasteful number, since it uses less digits than its factorization.

520636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 520636 is about 721.5511069910. The cubic root of 520636 is about 80.4472861942.

It can be divided in two parts, 520 and 636, that added together give a square (1156 = 34²).

The spelling of 520636 in words is "five hundred twenty thousand, six hundred thirty-six".