518999994 has 32 divisors (see below), whose sum is σ = 1156680000. Its totient is φ = 172498032.

The previous prime is 518999941. The next prime is 519000043. The reversal of 518999994 is 499999815.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5077 + ... + 32615.

It is an arithmetic number, because the mean of its divisors is an integer number (36146250).

Almost surely, 2^518999994 is an apocalyptic number.

518999994 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

518999994 is an abundant number, since it is smaller than the sum of its proper divisors (637680006).

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

518999994 is a wasteful number, since it uses less digits than its factorization.

518999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27899 (or 27893 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 63.

The square root of 518999994 is about 22781.5713681036. The cubic root of 518999994 is about 803.6293401717.

The spelling of 518999994 in words is "five hundred eighteen million, nine hundred ninety-nine thousand, nine hundred ninety-four".