478515899 has 4 divisors (see below), whose sum is σ = 478695120. Its totient is φ = 478336680.

The previous prime is 478515889. The next prime is 478515923. The reversal of 478515899 is 998515874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478515899 - 2²⁰ = 477467323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478515859) 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, 85544 + ... + 90965.

It is an arithmetic number, because the mean of its divisors is an integer number (119673780).

Almost surely, 2^478515899 is an apocalyptic number.

478515899 is a deficient number, since it is larger than the sum of its proper divisors (179221).

478515899 is a wasteful number, since it uses less digits than its factorization.

478515899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179220.

The product of its digits is 3628800, while the sum is 56.

The square root of 478515899 is about 21875.0062628562. The cubic root of 478515899 is about 782.1657424999.

The spelling of 478515899 in words is "four hundred seventy-eight million, five hundred fifteen thousand, eight hundred ninety-nine".