520347618 has 64 divisors (see below), whose sum is σ = 1329592320. Its totient is φ = 147762576.

The previous prime is 520347563. The next prime is 520347631. The reversal of 520347618 is 816743025.

520347618 is a `hidden beast` number, since 5 + 2 + 0 + 34 + 7 + 618 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59005 + ... + 67247.

It is an arithmetic number, because the mean of its divisors is an integer number (20774880).

Almost surely, 2^520347618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520347618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664796160).

520347618 is an abundant number, since it is smaller than the sum of its proper divisors (809244702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520347618 is a wasteful number, since it uses less digits than its factorization.

520347618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8428 (or 8422 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 520347618 is about 22811.1292574480. The cubic root of 520347618 is about 804.3243011172.

The spelling of 520347618 in words is "five hundred twenty million, three hundred forty-seven thousand, six hundred eighteen".