138162726 has 64 divisors (see below), whose sum is σ = 334219200. Its totient is φ = 42052608.

The previous prime is 138162721. The next prime is 138162763. The reversal of 138162726 is 627261831.

138162726 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 627 + 26 = 666.

138162726 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138162721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67080 + ... + 69108.

It is an arithmetic number, because the mean of its divisors is an integer number (5222175).

Almost surely, 2^138162726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138162726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167109600).

138162726 is an abundant number, since it is smaller than the sum of its proper divisors (196056474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138162726 is a wasteful number, since it uses less digits than its factorization.

138162726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2144 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 138162726 is about 11754.2641624221. The cubic root of 138162726 is about 516.9679640243.

The spelling of 138162726 in words is "one hundred thirty-eight million, one hundred sixty-two thousand, seven hundred twenty-six".