518388804 has 72 divisors (see below), whose sum is σ = 1359408960. Its totient is φ = 166364352.

The previous prime is 518388781. The next prime is 518388811. The reversal of 518388804 is 408883815.

It is a super-2 number, since 2×518388804² = 537453904225100832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 518388804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 712689 + ... + 713415.

It is an arithmetic number, because the mean of its divisors is an integer number (18880680).

Almost surely, 2^518388804 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 518388804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679704480).

518388804 is an abundant number, since it is smaller than the sum of its proper divisors (841020156).

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

518388804 is a wasteful number, since it uses less digits than its factorization.

518388804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 518388804 is about 22768.1532847967. The cubic root of 518388804 is about 803.3137569001.

The spelling of 518388804 in words is "five hundred eighteen million, three hundred eighty-eight thousand, eight hundred four".