520560387 has 6 divisors (see below), whose sum is σ = 751920572. Its totient is φ = 347040252.

The previous prime is 520560379. The next prime is 520560389. The reversal of 520560387 is 783065025.

520560387 is a `hidden beast` number, since 520 + 56 + 0 + 3 + 87 = 666.

It is not a de Polignac number, because 520560387 - 2³ = 520560379 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (520560389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28920013 + ... + 28920030.

Almost surely, 2^520560387 is an apocalyptic number.

520560387 is a deficient number, since it is larger than the sum of its proper divisors (231360185).

520560387 is a wasteful number, since it uses less digits than its factorization.

520560387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57840049 (or 57840046 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 520560387 is about 22815.7924911672. The cubic root of 520560387 is about 804.4339149926.

The spelling of 520560387 in words is "five hundred twenty million, five hundred sixty thousand, three hundred eighty-seven".