138202138 has 16 divisors (see below), whose sum is σ = 211903776. Its totient is φ = 67584400.

The previous prime is 138202133. The next prime is 138202151. The reversal of 138202138 is 831202831.

It is not an unprimeable number, because it can be changed into a prime (138202133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12645 + ... + 20887.

It is an arithmetic number, because the mean of its divisors is an integer number (13243986).

Almost surely, 2^138202138 is an apocalyptic number.

138202138 is a deficient number, since it is larger than the sum of its proper divisors (73701638).

138202138 is a wasteful number, since it uses less digits than its factorization.

138202138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8429.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 138202138 is about 11755.9405408500. The cubic root of 138202138 is about 517.0171157382.

Adding to 138202138 its reverse (831202831), we get a palindrome (969404969).

The spelling of 138202138 in words is "one hundred thirty-eight million, two hundred two thousand, one hundred thirty-eight".