478648389 has 8 divisors (see below), whose sum is σ = 638905120. Its totient is φ = 318745296.

The previous prime is 478648369. The next prime is 478648397. The reversal of 478648389 is 983846874.

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

It is not a de Polignac number, because 478648389 - 2²³ = 470259781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478648369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85234 + ... + 90675.

It is an arithmetic number, because the mean of its divisors is an integer number (79863140).

Almost surely, 2^478648389 is an apocalyptic number.

It is an amenable number.

478648389 is a deficient number, since it is larger than the sum of its proper divisors (160256731).

478648389 is a wasteful number, since it uses less digits than its factorization.

478648389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176819.

The product of its digits is 9289728, while the sum is 57.

The square root of 478648389 is about 21878.0343952559. The cubic root of 478648389 is about 782.2379237146.

The spelling of 478648389 in words is "four hundred seventy-eight million, six hundred forty-eight thousand, three hundred eighty-nine".