138660342 has 8 divisors (see below), whose sum is σ = 277320696. Its totient is φ = 46220112.

The previous prime is 138660341. The next prime is 138660343. The reversal of 138660342 is 243066831.

138660342 is nontrivially palindromic in base 15.

138660342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138660341) and next prime (138660343).

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

138660342 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138660341) 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, 11555023 + ... + 11555034.

It is an arithmetic number, because the mean of its divisors is an integer number (34665087).

Almost surely, 2^138660342 is an apocalyptic number.

138660342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138660342 is a wasteful number, since it uses less digits than its factorization.

138660342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23110062.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 138660342 is about 11775.4126042360. The cubic root of 138660342 is about 517.5878690440.

The spelling of 138660342 in words is "one hundred thirty-eight million, six hundred sixty thousand, three hundred forty-two".