478447 has 8 divisors (see below), whose sum is σ = 501296. Its totient is φ = 456192.

The previous prime is 478441. The next prime is 478451. The reversal of 478447 is 744874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478447 is a prime.

It is a Duffinian number.

478447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478441) 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, 2383 + ... + 2575.

It is an arithmetic number, because the mean of its divisors is an integer number (62662).

2⁴⁷⁸⁴⁴⁷ is an apocalyptic number.

478447 is a deficient number, since it is larger than the sum of its proper divisors (22849).

478447 is a wasteful number, since it uses less digits than its factorization.

478447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its digits is 25088, while the sum is 34.

The square root of 478447 is about 691.6986337994. The cubic root of 478447 is about 78.2128200714.

The spelling of 478447 in words is "four hundred seventy-eight thousand, four hundred forty-seven".