478815997 has 18 divisors (see below), whose sum is σ = 532886046. Its totient is φ = 429905520.

The previous prime is 478815991. The next prime is 478816007. The reversal of 478815997 is 799518874.

It can be written as a sum of positive squares in only one way, i.e., 415915236 + 62900761 = 20394^2 + 7931^2 .

It is not a de Polignac number, because 478815997 - 2¹⁵ = 478783229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478815991) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1283503 + ... + 1283875.

Almost surely, 2^478815997 is an apocalyptic number.

It is an amenable number.

478815997 is a deficient number, since it is larger than the sum of its proper divisors (54070049).

478815997 is a wasteful number, since it uses less digits than its factorization.

478815997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 487 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 58.

The square root of 478815997 is about 21881.8645686331. The cubic root of 478815997 is about 782.3292183102.

The spelling of 478815997 in words is "four hundred seventy-eight million, eight hundred fifteen thousand, nine hundred ninety-seven".