138244 has 24 divisors (see below), whose sum is σ = 272160. Its totient is φ = 61056.

The previous prime is 138241. The next prime is 138247. The reversal of 138244 is 442831.

It is an interprime number because it is at equal distance from previous prime (138241) and next prime (138247).

It is a super-2 number, since 2×138244² = 38222807072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2¹³⁸²⁴⁴ is an apocalyptic number.

It is an amenable number.

138244 is a deficient number, since it is larger than the sum of its proper divisors (133916).

138244 is a wasteful number, since it uses less digits than its factorization.

138244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 145 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 138244 is about 371.8117803405. The cubic root of 138244 is about 51.7069312677.

The spelling of 138244 in words is "one hundred thirty-eight thousand, two hundred forty-four".