478134218 has 4 divisors (see below), whose sum is σ = 717201330. Its totient is φ = 239067108.

The previous prime is 478134187. The next prime is 478134233. The reversal of 478134218 is 812431874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 477728449 + 405769 = 21857^2 + 637^2 .

It is a super-2 number, since 2×478134218² = 457224660844943048, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119533553 + ... + 119533556.

Almost surely, 2^478134218 is an apocalyptic number.

478134218 is a deficient number, since it is larger than the sum of its proper divisors (239067112).

478134218 is a wasteful number, since it uses less digits than its factorization.

478134218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239067111.

The product of its digits is 43008, while the sum is 38.

The square root of 478134218 is about 21866.2803878483. The cubic root of 478134218 is about 781.9577262749.

The spelling of 478134218 in words is "four hundred seventy-eight million, one hundred thirty-four thousand, two hundred eighteen".