44138 has 8 divisors (see below), whose sum is σ = 68580. Its totient is φ = 21280.

The previous prime is 44131. The next prime is 44159. The reversal of 44138 is 83144.

44138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38809 + 5329 = 197^2 + 73^2 .

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

It is not an unprimeable number, because it can be changed into a prime (44131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323 + ... + 438.

2⁴⁴¹³⁸ is an apocalyptic number.

44138 is a deficient number, since it is larger than the sum of its proper divisors (24442).

44138 is a wasteful number, since it uses less digits than its factorization.

44138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its digits is 384, while the sum is 20.

The square root of 44138 is about 210.0904567085. The cubic root of 44138 is about 35.3403530217.

The spelling of 44138 in words is "forty-four thousand, one hundred thirty-eight".