138148136 has 16 divisors (see below), whose sum is σ = 296031840. Its totient is φ = 59206320.

The previous prime is 138148133. The next prime is 138148159. The reversal of 138148136 is 631841831.

138148136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138148096 and 138148105.

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, 1233410 + ... + 1233521.

It is an arithmetic number, because the mean of its divisors is an integer number (18501990).

Almost surely, 2^138148136 is an apocalyptic number.

It is an amenable number.

138148136 is an abundant number, since it is smaller than the sum of its proper divisors (157883704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138148136 is a wasteful number, since it uses less digits than its factorization.

138148136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466944 (or 2466940 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 138148136 is about 11753.6435202026. The cubic root of 138148136 is about 516.9497660912.

Adding to 138148136 its reverse (631841831), we get a palindrome (769989967).

The spelling of 138148136 in words is "one hundred thirty-eight million, one hundred forty-eight thousand, one hundred thirty-six".