478687 has 4 divisors (see below), whose sum is σ = 522216. Its totient is φ = 435160.

The previous prime is 478679. The next prime is 478697. The reversal of 478687 is 786874.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 478687 - 2³ = 478679 is a prime.

It is a Duffinian number.

478687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21748 + ... + 21769.

It is an arithmetic number, because the mean of its divisors is an integer number (130554).

2⁴⁷⁸⁶⁸⁷ is an apocalyptic number.

478687 is a deficient number, since it is larger than the sum of its proper divisors (43529).

478687 is a wasteful number, since it uses less digits than its factorization.

478687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43528.

The product of its digits is 75264, while the sum is 40.

The square root of 478687 is about 691.8720980066. The cubic root of 478687 is about 78.2258956674.

The spelling of 478687 in words is "four hundred seventy-eight thousand, six hundred eighty-seven".