520218704 has 40 divisors (see below), whose sum is σ = 1057432320. Its totient is φ = 247587200.

The previous prime is 520218703. The next prime is 520218709. The reversal of 520218704 is 407812025.

It is a Harshad number since it is a multiple of its sum of digits (29).

Together with 537213616 it forms an amicable pair .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520218703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25049 + ... + 40839.

It is an arithmetic number, because the mean of its divisors is an integer number (26435808).

Almost surely, 2^520218704 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 520218704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528716160).

520218704 is an abundant number, since it is smaller than the sum of its proper divisors (537213616).

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

520218704 is a wasteful number, since it uses less digits than its factorization.

520218704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15899 (or 15893 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 520218704 is about 22808.3034002970. The cubic root of 520218704 is about 804.2578729428.

The spelling of 520218704 in words is "five hundred twenty million, two hundred eighteen thousand, seven hundred four".