518445384 has 16 divisors (see below), whose sum is σ = 1296113520. Its totient is φ = 172815120.

The previous prime is 518445373. The next prime is 518445407. The reversal of 518445384 is 483544815.

It is a happy 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, 10800922 + ... + 10800969.

It is an arithmetic number, because the mean of its divisors is an integer number (81007095).

Almost surely, 2^518445384 is an apocalyptic number.

It is an amenable number.

518445384 is an abundant number, since it is smaller than the sum of its proper divisors (777668136).

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

518445384 is a wasteful number, since it uses less digits than its factorization.

518445384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21601900 (or 21601896 counting only the distinct ones).

The product of its digits is 307200, while the sum is 42.

The square root of 518445384 is about 22769.3957759094. The cubic root of 518445384 is about 803.3429819647.

The spelling of 518445384 in words is "five hundred eighteen million, four hundred forty-five thousand, three hundred eighty-four".