478988217 has 12 divisors (see below), whose sum is σ = 692061760. Its totient is φ = 319237848.

The previous prime is 478988203. The next prime is 478988239. The reversal of 478988217 is 712889874.

It is a happy number.

478988217 is a `hidden beast` number, since 478 + 98 + 82 + 1 + 7 = 666.

It is not a de Polignac number, because 478988217 - 2⁴ = 478988201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478988267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58884 + ... + 66522.

Almost surely, 2^478988217 is an apocalyptic number.

It is an amenable number.

478988217 is a deficient number, since it is larger than the sum of its proper divisors (213073543).

478988217 is a wasteful number, since it uses less digits than its factorization.

478988217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14612 (or 14609 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 478988217 is about 21885.7994370779. The cubic root of 478988217 is about 782.4230028319.

The spelling of 478988217 in words is "four hundred seventy-eight million, nine hundred eighty-eight thousand, two hundred seventeen".