478643 has 8 divisors (see below), whose sum is σ = 532656. Its totient is φ = 426400.

The previous prime is 478637. The next prime is 478651. The reversal of 478643 is 346874.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 478643 - 2⁴ = 478627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 993.

It is an arithmetic number, because the mean of its divisors is an integer number (66582).

2⁴⁷⁸⁶⁴³ is an apocalyptic number.

478643 is a deficient number, since it is larger than the sum of its proper divisors (54013).

478643 is a wasteful number, since it uses less digits than its factorization.

478643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885.

The product of its digits is 16128, while the sum is 32.

The square root of 478643 is about 691.8402994911. The cubic root of 478643 is about 78.2234988020.

Subtracting from 478643 its reverse (346874), we obtain a square (131769 = 363²).

The spelling of 478643 in words is "four hundred seventy-eight thousand, six hundred forty-three".