138093238 has 16 divisors (see below), whose sum is σ = 211978944. Its totient is φ = 67439680.

The previous prime is 138093211. The next prime is 138093239. The reversal of 138093238 is 832390831.

It is a junction number, because it is equal to n+sod(n) for n = 138093197 and 138093206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138093239) 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, 56808 + ... + 59188.

It is an arithmetic number, because the mean of its divisors is an integer number (13248684).

Almost surely, 2^138093238 is an apocalyptic number.

138093238 is a deficient number, since it is larger than the sum of its proper divisors (73885706).

138093238 is a wasteful number, since it uses less digits than its factorization.

138093238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 138093238 is about 11751.3079272054. The cubic root of 138093238 is about 516.8812809874.

The spelling of 138093238 in words is "one hundred thirty-eight million, ninety-three thousand, two hundred thirty-eight".