478638 has 12 divisors (see below), whose sum is σ = 1037088. Its totient is φ = 159540.

The previous prime is 478637. The next prime is 478651. The reversal of 478638 is 836874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13278 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (86424).

2⁴⁷⁸⁶³⁸ is an apocalyptic number.

478638 is an abundant number, since it is smaller than the sum of its proper divisors (558450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

478638 is a wasteful number, since it uses less digits than its factorization.

478638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26599 (or 26596 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 478638 is about 691.8366859310. The cubic root of 478638 is about 78.2232264217.

The spelling of 478638 in words is "four hundred seventy-eight thousand, six hundred thirty-eight".