520512404 has 12 divisors (see below), whose sum is σ = 930277824. Its totient is φ = 254718744.

The previous prime is 520512403. The next prime is 520512407. The reversal of 520512404 is 404215025.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 520512404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520512401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384154 + ... + 1384529.

It is an arithmetic number, because the mean of its divisors is an integer number (77523152).

Almost surely, 2^520512404 is an apocalyptic number.

It is an amenable number.

520512404 is a deficient number, since it is larger than the sum of its proper divisors (409765420).

520512404 is a wasteful number, since it uses less digits than its factorization.

520512404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768734 (or 2768732 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 520512404 is about 22814.7409365086. The cubic root of 520512404 is about 804.4091978227.

Adding to 520512404 its reverse (404215025), we get a palindrome (924727429).

The spelling of 520512404 in words is "five hundred twenty million, five hundred twelve thousand, four hundred four".