138826 has 8 divisors (see below), whose sum is σ = 213444. Its totient is φ = 67680.

The previous prime is 138821. The next prime is 138829. The reversal of 138826 is 628831.

It can be written as a sum of positive squares in 2 ways, for example, as 123201 + 15625 = 351^2 + 125^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 138794 and 138803.

It is not an unprimeable number, because it can be changed into a prime (138821) 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, 765 + ... + 928.

2¹³⁸⁸²⁶ is an apocalyptic number.

138826 is a deficient number, since it is larger than the sum of its proper divisors (74618).

138826 is a wasteful number, since it uses less digits than its factorization.

138826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736.

The product of its digits is 2304, while the sum is 28.

The square root of 138826 is about 372.5936123983. The cubic root of 138826 is about 51.7793908365.

The spelling of 138826 in words is "one hundred thirty-eight thousand, eight hundred twenty-six".