518809042 has 16 divisors (see below), whose sum is σ = 801550872. Its totient is φ = 251665920.

The previous prime is 518809033. The next prime is 518809099. The reversal of 518809042 is 240908815.

It can be written as a sum of positive squares in 4 ways, for example, as 377175241 + 141633801 = 19421^2 + 11901^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 518808992 and 518809010.

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 7 ways as a sum of consecutive naturals, for example, 16192 + ... + 36052.

Almost surely, 2^518809042 is an apocalyptic number.

518809042 is a deficient number, since it is larger than the sum of its proper divisors (282741830).

518809042 is a wasteful number, since it uses less digits than its factorization.

518809042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 518809042 is about 22777.3800512702. The cubic root of 518809042 is about 803.5307701941.

The spelling of 518809042 in words is "five hundred eighteen million, eight hundred nine thousand, forty-two".