3138918138 has 12 divisors (see below), whose sum is σ = 6800989338. Its totient is φ = 1046306040.

The previous prime is 3138918137. The next prime is 3138918149. The reversal of 3138918138 is 8318198313.

It can be written as a sum of positive squares in only one way, i.e., 2889815049 + 249103089 = 53757^2 + 15783^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3138918093 and 3138918102.

It is not an unprimeable number, because it can be changed into a prime (3138918137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87192153 + ... + 87192188.

Almost surely, 2^3138918138 is an apocalyptic number.

3138918138 is an abundant number, since it is smaller than the sum of its proper divisors (3662071200).

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

3138918138 is a wasteful number, since it uses less digits than its factorization.

3138918138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174384349 (or 174384346 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 3138918138 is about 56026.0487452042. The cubic root of 3138918138 is about 1464.1761551225.

The spelling of 3138918138 in words is "three billion, one hundred thirty-eight million, nine hundred eighteen thousand, one hundred thirty-eight".