478688506 has 8 divisors (see below), whose sum is σ = 718196724. Its totient is φ = 239289600.

The previous prime is 478688503. The next prime is 478688519. The reversal of 478688506 is 605886874.

It can be written as a sum of positive squares in 2 ways, for example, as 468506025 + 10182481 = 21645^2 + 3191^2 .

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

It is not an unprimeable number, because it can be changed into a prime (478688503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15325 + ... + 34528.

Almost surely, 2^478688506 is an apocalyptic number.

478688506 is a deficient number, since it is larger than the sum of its proper divisors (239508218).

478688506 is a wasteful number, since it uses less digits than its factorization.

478688506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54656.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The square root of 478688506 is about 21878.9512088674. The cubic root of 478688506 is about 782.2597770296.

The spelling of 478688506 in words is "four hundred seventy-eight million, six hundred eighty-eight thousand, five hundred six".