394784387494 has 16 divisors (see below), whose sum is σ = 676958284800. Its totient is φ = 169147046664.

The previous prime is 394784387477. The next prime is 394784387513. The reversal of 394784387494 is 494783487493.

It is a congruent number.

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, 3802134 + ... + 3904585.

It is an arithmetic number, because the mean of its divisors is an integer number (42309892800).

Almost surely, 2^394784387494 is an apocalyptic number.

394784387494 is a deficient number, since it is larger than the sum of its proper divisors (282173897306).

394784387494 is a wasteful number, since it uses less digits than its factorization.

394784387494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710387.

The product of its digits is 585252864, while the sum is 70.

Subtracting 394784387494 from its reverse (494783487493), we obtain a palindrome (99999099999).

The spelling of 394784387494 in words is "three hundred ninety-four billion, seven hundred eighty-four million, three hundred eighty-seven thousand, four hundred ninety-four".