138148138 has 8 divisors (see below), whose sum is σ = 207278820. Its totient is φ = 69055200.

The previous prime is 138148133. The next prime is 138148159. The reversal of 138148138 is 831841831.

It can be written as a sum of positive squares in 2 ways, for example, as 138133009 + 15129 = 11753^2 + 123^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 138148097 and 138148106.

It is not an unprimeable number, because it can be changed into a prime (138148133) 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, 2988 + ... + 16888.

Almost surely, 2^138148138 is an apocalyptic number.

138148138 is a deficient number, since it is larger than the sum of its proper divisors (69130682).

138148138 is a wasteful number, since it uses less digits than its factorization.

138148138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18872.

The product of its digits is 18432, while the sum is 37.

The square root of 138148138 is about 11753.6436052826. The cubic root of 138148138 is about 516.9497685859.

Adding to 138148138 its reverse (831841831), we get a palindrome (969989969).

It can be divided in two parts, 13814 and 8138, that added together give a cube (21952 = 28³).

The spelling of 138148138 in words is "one hundred thirty-eight million, one hundred forty-eight thousand, one hundred thirty-eight".