113638 has 8 divisors (see below), whose sum is σ = 194832. Its totient is φ = 48696.

The previous prime is 113623. The next prime is 113647. The reversal of 113638 is 836311.

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

It is a nialpdrome in base 7.

It is a congruent number.

It is an unprimeable number.

113638 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4045 + ... + 4072.

It is an arithmetic number, because the mean of its divisors is an integer number (24354).

2¹¹³⁶³⁸ is an apocalyptic number.

113638 is a deficient number, since it is larger than the sum of its proper divisors (81194).

113638 is an equidigital number, since it uses as much as digits as its factorization.

113638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126.

The product of its digits is 432, while the sum is 22.

The square root of 113638 is about 337.1023583424. The cubic root of 113638 is about 48.4366978015.

Adding to 113638 its reverse (836311), we get a palindrome (949949).

The spelling of 113638 in words is "one hundred thirteen thousand, six hundred thirty-eight".