478320729 has 24 divisors (see below), whose sum is σ = 655056672. Its totient is φ = 310443840.

The previous prime is 478320683. The next prime is 478320743. The reversal of 478320729 is 927023874.

It is not a de Polignac number, because 478320729 - 2¹³ = 478312537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478320769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1702069 + ... + 1702349.

It is an arithmetic number, because the mean of its divisors is an integer number (27294028).

Almost surely, 2^478320729 is an apocalyptic number.

It is an amenable number.

478320729 is a deficient number, since it is larger than the sum of its proper divisors (176735943).

478320729 is a wasteful number, since it uses less digits than its factorization.

478320729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 478320729 is about 21870.5447805947. The cubic root of 478320729 is about 782.0593886342.

The spelling of 478320729 in words is "four hundred seventy-eight million, three hundred twenty thousand, seven hundred twenty-nine".