394381868 has 6 divisors (see below), whose sum is σ = 690168276. Its totient is φ = 197190932.

The previous prime is 394381847. The next prime is 394381903. The reversal of 394381868 is 868183493.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49297730 + ... + 49297737.

It is an arithmetic number, because the mean of its divisors is an integer number (115028046).

Almost surely, 2^394381868 is an apocalyptic number.

It is an amenable number.

394381868 is a deficient number, since it is larger than the sum of its proper divisors (295786408).

394381868 is a wasteful number, since it uses less digits than its factorization.

394381868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98595471 (or 98595469 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 394381868 is about 19859.0500276322. The cubic root of 394381868 is about 733.3404598940.

The spelling of 394381868 in words is "three hundred ninety-four million, three hundred eighty-one thousand, eight hundred sixty-eight".