518904445 has 8 divisors (see below), whose sum is σ = 623075544. Its totient is φ = 414863424.

The previous prime is 518904437. The next prime is 518904461. The reversal of 518904445 is 544409815.

It can be written as a sum of positive squares in 4 ways, for example, as 1159929 + 517744516 = 1077^2 + 22754^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 518904445 - 2³ = 518904437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518904398 and 518904407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23514 + ... + 39883.

It is an arithmetic number, because the mean of its divisors is an integer number (77884443).

Almost surely, 2^518904445 is an apocalyptic number.

It is an amenable number.

518904445 is a deficient number, since it is larger than the sum of its proper divisors (104171099).

518904445 is a wasteful number, since it uses less digits than its factorization.

518904445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65039.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 518904445 is about 22779.4742037651. The cubic root of 518904445 is about 803.5800205228.

The spelling of 518904445 in words is "five hundred eighteen million, nine hundred four thousand, four hundred forty-five".