478439 has 12 divisors (see below), whose sum is σ = 549000. Its totient is φ = 415584.

The previous prime is 478433. The next prime is 478441. The reversal of 478439 is 934874.

It is not a de Polignac number, because 478439 - 2¹² = 474343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 478399 and 478408.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478439.

It is not an unprimeable number, because it can be changed into a prime (478433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3137 + ... + 3285.

It is an arithmetic number, because the mean of its divisors is an integer number (45750).

478439 is a Friedman number, since it can be written as 7*4^8+4+3^9, using all its digits and the basic arithmetic operations.

2⁴⁷⁸⁴³⁹ is an apocalyptic number.

478439 is a deficient number, since it is larger than the sum of its proper divisors (70561).

478439 is a wasteful number, since it uses less digits than its factorization.

478439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 181 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 478439 is about 691.6928509100. The cubic root of 478439 is about 78.2123841429.

The spelling of 478439 in words is "four hundred seventy-eight thousand, four hundred thirty-nine".