138682742 has 8 divisors (see below), whose sum is σ = 226935432. Its totient is φ = 63037600.

The previous prime is 138682741. The next prime is 138682751. The reversal of 138682742 is 247286831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138682742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138682741) 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, 3151859 + ... + 3151902.

It is an arithmetic number, because the mean of its divisors is an integer number (28366929).

Almost surely, 2^138682742 is an apocalyptic number.

138682742 is a deficient number, since it is larger than the sum of its proper divisors (88252690).

138682742 is a wasteful number, since it uses less digits than its factorization.

138682742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6303774.

The product of its digits is 129024, while the sum is 41.

The square root of 138682742 is about 11776.3637002260. The cubic root of 138682742 is about 517.6157389306.

The spelling of 138682742 in words is "one hundred thirty-eight million, six hundred eighty-two thousand, seven hundred forty-two".