520386387 has 16 divisors (see below), whose sum is σ = 720593280. Its totient is φ = 333793152.

The previous prime is 520386379. The next prime is 520386401. The reversal of 520386387 is 783683025.

It is not a de Polignac number, because 520386387 - 2³ = 520386379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520386187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21462 + ... + 38747.

It is an arithmetic number, because the mean of its divisors is an integer number (45037080).

Almost surely, 2^520386387 is an apocalyptic number.

520386387 is a deficient number, since it is larger than the sum of its proper divisors (200206893).

520386387 is a wasteful number, since it uses less digits than its factorization.

520386387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60322.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 520386387 is about 22811.9790241881. The cubic root of 520386387 is about 804.3442762731.

The spelling of 520386387 in words is "five hundred twenty million, three hundred eighty-six thousand, three hundred eighty-seven".