518420478 has 8 divisors (see below), whose sum is σ = 1036840968. Its totient is φ = 172806824.

The previous prime is 518420447. The next prime is 518420489. The reversal of 518420478 is 874024815.

It is a happy number.

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

518420478 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43201701 + ... + 43201712.

It is an arithmetic number, because the mean of its divisors is an integer number (129605121).

Almost surely, 2^518420478 is an apocalyptic number.

518420478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

518420478 is a wasteful number, since it uses less digits than its factorization.

518420478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86403418.

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 518420478 is about 22768.8488510069. The cubic root of 518420478 is about 803.3301176198.

The spelling of 518420478 in words is "five hundred eighteen million, four hundred twenty thousand, four hundred seventy-eight".