478491 has 8 divisors (see below), whose sum is σ = 687120. Its totient is φ = 294432.

The previous prime is 478483. The next prime is 478493. The reversal of 478491 is 194874.

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

It is not a de Polignac number, because 478491 - 2³ = 478483 is a prime.

478491 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478493) 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 7 ways as a sum of consecutive naturals, for example, 6096 + ... + 6173.

It is an arithmetic number, because the mean of its divisors is an integer number (85890).

2⁴⁷⁸⁴⁹¹ is an apocalyptic number.

478491 is a deficient number, since it is larger than the sum of its proper divisors (208629).

478491 is a wasteful number, since it uses less digits than its factorization.

478491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12285.

The product of its digits is 8064, while the sum is 33.

The square root of 478491 is about 691.7304388271. The cubic root of 478491 is about 78.2152175913.

It can be divided in two parts, 478 and 491, that added together give a palindrome (969).

The spelling of 478491 in words is "four hundred seventy-eight thousand, four hundred ninety-one".