138022742 has 16 divisors (see below), whose sum is σ = 243229392. Its totient is φ = 57911520.

The previous prime is 138022741. The next prime is 138022777. The reversal of 138022742 is 247220831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138022741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241013 + ... + 241584.

It is an arithmetic number, because the mean of its divisors is an integer number (15201837).

Almost surely, 2^138022742 is an apocalyptic number.

138022742 is a deficient number, since it is larger than the sum of its proper divisors (105206650).

138022742 is a wasteful number, since it uses less digits than its factorization.

138022742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482623.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 138022742 is about 11748.3080483957. The cubic root of 138022742 is about 516.7933107977.

The spelling of 138022742 in words is "one hundred thirty-eight million, twenty-two thousand, seven hundred forty-two".