138158948 has 6 divisors (see below), whose sum is σ = 241778166. Its totient is φ = 69079472.

The previous prime is 138158941. The next prime is 138158959. The reversal of 138158948 is 849851831.

138158948 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 135443044 + 2715904 = 11638^2 + 1648^2 .

138158948 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (138158941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17269865 + ... + 17269872.

It is an arithmetic number, because the mean of its divisors is an integer number (40296361).

Almost surely, 2^138158948 is an apocalyptic number.

It is an amenable number.

138158948 is a deficient number, since it is larger than the sum of its proper divisors (103619218).

138158948 is a wasteful number, since it uses less digits than its factorization.

138158948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34539741 (or 34539739 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 138158948 is about 11754.1034536880. The cubic root of 138158948 is about 516.9632518928.

The spelling of 138158948 in words is "one hundred thirty-eight million, one hundred fifty-eight thousand, nine hundred forty-eight".