478487 has 4 divisors (see below), whose sum is σ = 479880. Its totient is φ = 477096.

The previous prime is 478483. The next prime is 478493. The reversal of 478487 is 784874.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 784874 = 2 ⋅392437.

It is a cyclic number.

It is not a de Polignac number, because 478487 - 2² = 478483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478487.

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 478487.

It is not an unprimeable number, because it can be changed into a prime (478481) 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 3 ways as a sum of consecutive naturals, for example, 233 + ... + 1005.

It is an arithmetic number, because the mean of its divisors is an integer number (119970).

2⁴⁷⁸⁴⁸⁷ is an apocalyptic number.

478487 is a deficient number, since it is larger than the sum of its proper divisors (1393).

478487 is an equidigital number, since it uses as much as digits as its factorization.

478487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392.

The product of its digits is 50176, while the sum is 38.

The square root of 478487 is about 691.7275475214. The cubic root of 478487 is about 78.2149996410.

The spelling of 478487 in words is "four hundred seventy-eight thousand, four hundred eighty-seven".