2731912138 has 32 divisors (see below), whose sum is σ = 4529364480. Its totient is φ = 1230113280.

The previous prime is 2731912133. The next prime is 2731912159. The reversal of 2731912138 is 8312191372.

It is a junction number, because it is equal to n+sod(n) for n = 2731912097 and 2731912106.

It is not an unprimeable number, because it can be changed into a prime (2731912133) 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 15 ways as a sum of consecutive naturals, for example, 79245 + ... + 108367.

It is an arithmetic number, because the mean of its divisors is an integer number (141542640).

Almost surely, 2^2731912138 is an apocalyptic number.

2731912138 is a deficient number, since it is larger than the sum of its proper divisors (1797452342).

2731912138 is a wasteful number, since it uses less digits than its factorization.

2731912138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29262.

The product of its digits is 18144, while the sum is 37.

The square root of 2731912138 is about 52267.6968882311. The cubic root of 2731912138 is about 1397.9412150724.

The spelling of 2731912138 in words is "two billion, seven hundred thirty-one million, nine hundred twelve thousand, one hundred thirty-eight".