4678638 has 16 divisors (see below), whose sum is σ = 9907920. Its totient is φ = 1467776.

The previous prime is 4678631. The next prime is 4678649. The reversal of 4678638 is 8368764.

It is a self number, because there is not a number n which added to its sum of digits gives 4678638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4678631) 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, 22833 + ... + 23036.

It is an arithmetic number, because the mean of its divisors is an integer number (619245).

Almost surely, 2^4678638 is an apocalyptic number.

4678638 is an abundant number, since it is smaller than the sum of its proper divisors (5229282).

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

4678638 is a wasteful number, since it uses less digits than its factorization.

4678638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45891.

The product of its digits is 193536, while the sum is 42.

The square root of 4678638 is about 2163.0159500105. The cubic root of 4678638 is about 167.2527040570.

The spelling of 4678638 in words is "four million, six hundred seventy-eight thousand, six hundred thirty-eight".