518399998 has 8 divisors (see below), whose sum is σ = 804413880. Its totient is φ = 250262040.

The previous prime is 518399993. The next prime is 518400017. The reversal of 518399998 is 899993815.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518399993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4468908 + ... + 4469023.

It is an arithmetic number, because the mean of its divisors is an integer number (100551735).

Almost surely, 2^518399998 is an apocalyptic number.

518399998 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

518399998 is a deficient number, since it is larger than the sum of its proper divisors (286013882).

518399998 is a wasteful number, since it uses less digits than its factorization.

518399998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8937962.

The product of its digits is 6298560, while the sum is 61.

The square root of 518399998 is about 22768.3991092918. The cubic root of 518399998 is about 803.3195390655.

The spelling of 518399998 in words is "five hundred eighteen million, three hundred ninety-nine thousand, nine hundred ninety-eight".