478239 has 16 divisors (see below), whose sum is σ = 691200. Its totient is φ = 293216.

The previous prime is 478213. The next prime is 478241. The reversal of 478239 is 932874.

It is a cyclic number.

It is not a de Polignac number, because 478239 - 2⁵ = 478207 is a prime.

It is a super-2 number, since 2×478239² = 457425082242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1882 + ... + 2120.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁴⁷⁸²³⁹ is an apocalyptic number.

478239 is a deficient number, since it is larger than the sum of its proper divisors (212961).

478239 is a wasteful number, since it uses less digits than its factorization.

478239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294.

The product of its digits is 12096, while the sum is 33.

The square root of 478239 is about 691.5482629578. The cubic root of 478239 is about 78.2014843507.

It can be divided in two parts, 478 and 239, that added together give a palindrome (717).

The spelling of 478239 in words is "four hundred seventy-eight thousand, two hundred thirty-nine".