518722004 has 12 divisors (see below), whose sum is σ = 914390484. Its totient is φ = 257467584.

The previous prime is 518721991. The next prime is 518722019. The reversal of 518722004 is 400227815.

It can be written as a sum of positive squares in 2 ways, for example, as 170824900 + 347897104 = 13070^2 + 18652^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472739 + ... + 473834.

It is an arithmetic number, because the mean of its divisors is an integer number (76199207).

Almost surely, 2^518722004 is an apocalyptic number.

It is an amenable number.

518722004 is a deficient number, since it is larger than the sum of its proper divisors (395668480).

518722004 is a wasteful number, since it uses less digits than its factorization.

518722004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946714 (or 946712 counting only the distinct ones).

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

The square root of 518722004 is about 22775.4693475239. The cubic root of 518722004 is about 803.4858329006.

Adding to 518722004 its reverse (400227815), we get a palindrome (918949819).

The spelling of 518722004 in words is "five hundred eighteen million, seven hundred twenty-two thousand, four".