138788342 has 32 divisors (see below), whose sum is σ = 262151424. Its totient is φ = 53532000.

The previous prime is 138788341. The next prime is 138788347. The reversal of 138788342 is 243887831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 138788293 and 138788302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138788341) 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, 11093 + ... + 20015.

It is an arithmetic number, because the mean of its divisors is an integer number (8192232).

Almost surely, 2^138788342 is an apocalyptic number.

138788342 is a deficient number, since it is larger than the sum of its proper divisors (123363082).

138788342 is a wasteful number, since it uses less digits than its factorization.

138788342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9044.

The product of its digits is 258048, while the sum is 44.

The square root of 138788342 is about 11780.8464042275. The cubic root of 138788342 is about 517.7470851323.

The spelling of 138788342 in words is "one hundred thirty-eight million, seven hundred eighty-eight thousand, three hundred forty-two".