518321394 has 12 divisors (see below), whose sum is σ = 1123029726. Its totient is φ = 172773792.

The previous prime is 518321369. The next prime is 518321411. The reversal of 518321394 is 493123815.

518321394 is a `hidden beast` number, since 518 + 3 + 2 + 139 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 371063169 + 147258225 = 19263^2 + 12135^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14397799 + ... + 14397834.

Almost surely, 2^518321394 is an apocalyptic number.

518321394 is an abundant number, since it is smaller than the sum of its proper divisors (604708332).

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

518321394 is a wasteful number, since it uses less digits than its factorization.

518321394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28795641 (or 28795638 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 518321394 is about 22766.6728794525. The cubic root of 518321394 is about 803.2789350782.

The spelling of 518321394 in words is "five hundred eighteen million, three hundred twenty-one thousand, three hundred ninety-four".