478218873 has 8 divisors (see below), whose sum is σ = 695591136. Its totient is φ = 289829600.

The previous prime is 478218773. The next prime is 478218887. The reversal of 478218873 is 378812874.

It is a happy number.

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 478218873 - 2¹⁰ = 478217849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (478218073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7245708 + ... + 7245773.

It is an arithmetic number, because the mean of its divisors is an integer number (86948892).

Almost surely, 2^478218873 is an apocalyptic number.

It is an amenable number.

478218873 is a deficient number, since it is larger than the sum of its proper divisors (217372263).

478218873 is a wasteful number, since it uses less digits than its factorization.

478218873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14491495.

The product of its digits is 602112, while the sum is 48.

The square root of 478218873 is about 21868.2160452105. The cubic root of 478218873 is about 782.0038728187.

The spelling of 478218873 in words is "four hundred seventy-eight million, two hundred eighteen thousand, eight hundred seventy-three".