23638 has 8 divisors (see below), whose sum is σ = 36288. Its totient is φ = 11544.

The previous prime is 23633. The next prime is 23663. The reversal of 23638 is 83632.

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

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23633) 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, 6 + ... + 217.

It is an arithmetic number, because the mean of its divisors is an integer number (4536).

2²³⁶³⁸ is an apocalyptic number.

23638 is a deficient number, since it is larger than the sum of its proper divisors (12650).

23638 is a wasteful number, since it uses less digits than its factorization.

23638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278.

The product of its digits is 864, while the sum is 22.

The square root of 23638 is about 153.7465446766. The cubic root of 23638 is about 28.6992298676.

The spelling of 23638 in words is "twenty-three thousand, six hundred thirty-eight".