394395758338 has 16 divisors (see below), whose sum is σ = 592600190616. Its totient is φ = 196862632960.

The previous prime is 394395758321. The next prime is 394395758363. The reversal of 394395758338 is 833857593493.

It can be written as a sum of positive squares in 4 ways, for example, as 363552320209 + 30843438129 = 602953^2 + 175623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2893398 + ... + 3026638.

Almost surely, 2^394395758338 is an apocalyptic number.

394395758338 is a deficient number, since it is larger than the sum of its proper divisors (198204432278).

394395758338 is a wasteful number, since it uses less digits than its factorization.

394395758338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135749.

The product of its digits is 293932800, while the sum is 67.

The spelling of 394395758338 in words is "three hundred ninety-four billion, three hundred ninety-five million, seven hundred fifty-eight thousand, three hundred thirty-eight".