478457918 has 4 divisors (see below), whose sum is σ = 717686880. Its totient is φ = 239228958.

The previous prime is 478457897. The next prime is 478457929. The reversal of 478457918 is 819754874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 819754874 = 2 ⋅409877437.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 478457918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119614478 + ... + 119614481.

It is an arithmetic number, because the mean of its divisors is an integer number (179421720).

Almost surely, 2^478457918 is an apocalyptic number.

478457918 is a deficient number, since it is larger than the sum of its proper divisors (239228962).

478457918 is a wasteful number, since it uses less digits than its factorization.

478457918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239228961.

The product of its digits is 2257920, while the sum is 53.

The square root of 478457918 is about 21873.6809430877. The cubic root of 478457918 is about 782.1341499698.

The spelling of 478457918 in words is "four hundred seventy-eight million, four hundred fifty-seven thousand, nine hundred eighteen".