520388 has 12 divisors (see below), whose sum is σ = 993552. Its totient is φ = 236520.

The previous prime is 520381. The next prime is 520393. The reversal of 520388 is 883025.

It is not an unprimeable number, because it can be changed into a prime (520381) by changing a digit.

520388 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 in 3 ways as a sum of consecutive naturals, for example, 5870 + ... + 5957.

It is an arithmetic number, because the mean of its divisors is an integer number (82796).

2⁵²⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

520388 is a deficient number, since it is larger than the sum of its proper divisors (473164).

520388 is a wasteful number, since it uses less digits than its factorization.

520388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842 (or 11840 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 520388 is about 721.3792345223. The cubic root of 520388 is about 80.4345107326.

The spelling of 520388 in words is "five hundred twenty thousand, three hundred eighty-eight".