138616 has 8 divisors (see below), whose sum is σ = 259920. Its totient is φ = 69304.

The previous prime is 138599. The next prime is 138617. The reversal of 138616 is 616831.

138616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8656 + ... + 8671.

It is an arithmetic number, because the mean of its divisors is an integer number (32490).

2¹³⁸⁶¹⁶ is an apocalyptic number.

It is an amenable number.

138616 is a deficient number, since it is larger than the sum of its proper divisors (121304).

138616 is a wasteful number, since it uses less digits than its factorization.

138616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333 (or 17329 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 138616 is about 372.3116973720. The cubic root of 138616 is about 51.7532690258.

The spelling of 138616 in words is "one hundred thirty-eight thousand, six hundred sixteen".