520243620 has 48 divisors (see below), whose sum is σ = 1568736960. Its totient is φ = 128059776.

The previous prime is 520243609. The next prime is 520243657. The reversal of 520243620 is 26342025.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332710 + ... + 334269.

It is an arithmetic number, because the mean of its divisors is an integer number (32682020).

Almost surely, 2^520243620 is an apocalyptic number.

It is an amenable number.

520243620 is an abundant number, since it is smaller than the sum of its proper divisors (1048493340).

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

520243620 is a wasteful number, since it uses less digits than its factorization.

520243620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667004 (or 667002 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 520243620 is about 22808.8495983467. The cubic root of 520243620 is about 804.2707127793.

Adding to 520243620 its reverse (26342025), we get a palindrome (546585645).

The spelling of 520243620 in words is "five hundred twenty million, two hundred forty-three thousand, six hundred twenty".