478168538 has 8 divisors (see below), whose sum is σ = 736638132. Its totient is φ = 232622496.

The previous prime is 478168517. The next prime is 478168541. The reversal of 478168538 is 835861874.

It can be written as a sum of positive squares in 2 ways, for example, as 424483609 + 53684929 = 20603^2 + 7327^2 .

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

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, 3230795 + ... + 3230942.

Almost surely, 2^478168538 is an apocalyptic number.

478168538 is a deficient number, since it is larger than the sum of its proper divisors (258469594).

478168538 is a wasteful number, since it uses less digits than its factorization.

478168538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461776.

The product of its digits is 1290240, while the sum is 50.

The square root of 478168538 is about 21867.0651437270. The cubic root of 478168538 is about 781.9764352107.

The spelling of 478168538 in words is "four hundred seventy-eight million, one hundred sixty-eight thousand, five hundred thirty-eight".