138093188 has 6 divisors (see below), whose sum is σ = 241663086. Its totient is φ = 69046592.

The previous prime is 138093181. The next prime is 138093209. The reversal of 138093188 is 881390831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 98049604 + 40043584 = 9902^2 + 6328^2 .

It is not an unprimeable number, because it can be changed into a prime (138093181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17261645 + ... + 17261652.

It is an arithmetic number, because the mean of its divisors is an integer number (40277181).

Almost surely, 2^138093188 is an apocalyptic number.

It is an amenable number.

138093188 is a deficient number, since it is larger than the sum of its proper divisors (103569898).

138093188 is a wasteful number, since it uses less digits than its factorization.

138093188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34523301 (or 34523299 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 138093188 is about 11751.3057997824. The cubic root of 138093188 is about 516.8812186043.

The spelling of 138093188 in words is "one hundred thirty-eight million, ninety-three thousand, one hundred eighty-eight".