2144739538 has 8 divisors (see below), whose sum is σ = 3217326588. Its totient is φ = 1072297344.

The previous prime is 2144739517. The next prime is 2144739547. The reversal of 2144739538 is 8359374412.

It can be written as a sum of positive squares in 2 ways, for example, as 2022570729 + 122168809 = 44973^2 + 11053^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15670 + ... + 67342.

Almost surely, 2^2144739538 is an apocalyptic number.

2144739538 is a deficient number, since it is larger than the sum of its proper divisors (1072587050).

2144739538 is a wasteful number, since it uses less digits than its factorization.

2144739538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72428.

The product of its digits is 725760, while the sum is 46.

The square root of 2144739538 is about 46311.3327167336. The cubic root of 2144739538 is about 1289.6093879742.

The spelling of 2144739538 in words is "two billion, one hundred forty-four million, seven hundred thirty-nine thousand, five hundred thirty-eight".