138344 has 8 divisors (see below), whose sum is σ = 259410. Its totient is φ = 69168.
The previous prime is 138337. The next prime is 138349. The reversal of 138344 is 443831.
It can be written as a sum of positive squares in only one way, i.e., 136900 + 1444 = 370^2 + 38^2 .
It is a tau number, because it is divible by the number of its divisors (8).
It is not an unprimeable number, because it can be changed into a prime (138349) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8639 + ... + 8654.
2138344 is an apocalyptic number.
It is an amenable number.
138344 is a deficient number, since it is larger than the sum of its proper divisors (121066).
138344 is a wasteful number, since it uses less digits than its factorization.
138344 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 17299 (or 17295 counting only the distinct ones).
The product of its digits is 1152, while the sum is 23.
The square root of 138344 is about 371.9462326735. The cubic root of 138344 is about 51.7193958156.
The spelling of 138344 in words is "one hundred thirty-eight thousand, three hundred forty-four".
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