518038894 has 4 divisors (see below), whose sum is σ = 777058344. Its totient is φ = 259019446.

The previous prime is 518038891. The next prime is 518038949. The reversal of 518038894 is 498830815.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518038891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129509722 + ... + 129509725.

It is an arithmetic number, because the mean of its divisors is an integer number (194264586).

Almost surely, 2^518038894 is an apocalyptic number.

518038894 is a deficient number, since it is larger than the sum of its proper divisors (259019450).

518038894 is a wasteful number, since it uses less digits than its factorization.

518038894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259019449.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 518038894 is about 22760.4677895688. The cubic root of 518038894 is about 803.1329718841.

The spelling of 518038894 in words is "five hundred eighteen million, thirty-eight thousand, eight hundred ninety-four".