109638 has 12 divisors (see below), whose sum is σ = 237588. Its totient is φ = 36540.

The previous prime is 109621. The next prime is 109639. The reversal of 109638 is 836901.

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

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109639) by changing a digit.

109638 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 5 ways as a sum of consecutive naturals, for example, 3028 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (19799).

2¹⁰⁹⁶³⁸ is an apocalyptic number.

109638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

109638 is an abundant number, since it is smaller than the sum of its proper divisors (127950).

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

109638 is a wasteful number, since it uses less digits than its factorization.

109638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099 (or 6096 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 109638 is about 331.1162937700. The cubic root of 109638 is about 47.8615803839.

It can be divided in two parts, 109 and 638, that added together give a palindrome (747).

The spelling of 109638 in words is "one hundred nine thousand, six hundred thirty-eight".