520930904 has 64 divisors (see below), whose sum is σ = 1117519200. Its totient is φ = 225662976.

The previous prime is 520930903. The next prime is 520930957. The reversal of 520930904 is 409039025.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520930901) 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, 222122 + ... + 224454.

Almost surely, 2^520930904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520930904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558759600).

520930904 is an abundant number, since it is smaller than the sum of its proper divisors (596588296).

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

520930904 is a wasteful number, since it uses less digits than its factorization.

520930904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 520930904 is about 22823.9107954794. The cubic root of 520930904 is about 804.6247258705.

Adding to 520930904 its reverse (409039025), we get a palindrome (929969929).

The spelling of 520930904 in words is "five hundred twenty million, nine hundred thirty thousand, nine hundred four".