478346217 has 16 divisors (see below), whose sum is σ = 650791680. Its totient is φ = 312435792.

The previous prime is 478346179. The next prime is 478346227. The reversal of 478346217 is 712643874.

It is a de Polignac number, because none of the positive numbers 2^k-478346217 is a prime.

It is a super-2 number, since 2×478346217² = 457630206636422178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478346227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49938 + ... + 58740.

It is an arithmetic number, because the mean of its divisors is an integer number (40674480).

Almost surely, 2^478346217 is an apocalyptic number.

It is an amenable number.

478346217 is a deficient number, since it is larger than the sum of its proper divisors (172445463).

478346217 is a wasteful number, since it uses less digits than its factorization.

478346217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172.

The product of its digits is 225792, while the sum is 42.

The square root of 478346217 is about 21871.1274743667. The cubic root of 478346217 is about 782.0732794362.

The spelling of 478346217 in words is "four hundred seventy-eight million, three hundred forty-six thousand, two hundred seventeen".