518321396 has 6 divisors (see below), whose sum is σ = 907062450. Its totient is φ = 259160696.

The previous prime is 518321369. The next prime is 518321411. The reversal of 518321396 is 693123815.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 497290000 + 21031396 = 22300^2 + 4586^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64790171 + ... + 64790178.

It is an arithmetic number, because the mean of its divisors is an integer number (151177075).

Almost surely, 2^518321396 is an apocalyptic number.

It is an amenable number.

518321396 is a deficient number, since it is larger than the sum of its proper divisors (388741054).

518321396 is a wasteful number, since it uses less digits than its factorization.

518321396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129580353 (or 129580351 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 518321396 is about 22766.6729233764. The cubic root of 518321396 is about 803.2789361114.

The spelling of 518321396 in words is "five hundred eighteen million, three hundred twenty-one thousand, three hundred ninety-six".