138446 has 32 divisors (see below), whose sum is σ = 276480. Its totient is φ = 50400.

The previous prime is 138433. The next prime is 138449. The reversal of 138446 is 644831.

138446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4451 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (8640).

2¹³⁸⁴⁴⁶ is an apocalyptic number.

138446 is a deficient number, since it is larger than the sum of its proper divisors (138034).

138446 is a wasteful number, since it uses less digits than its factorization.

138446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80.

The product of its digits is 2304, while the sum is 26.

The square root of 138446 is about 372.0833240015. The cubic root of 138446 is about 51.7321034680.

The spelling of 138446 in words is "one hundred thirty-eight thousand, four hundred forty-six".