394578199834 has 32 divisors (see below), whose sum is σ = 728520468480. Its totient is φ = 156082211712.

The previous prime is 394578199817. The next prime is 394578199843. The reversal of 394578199834 is 438991875493.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955527 + ... + 2147845.

It is an arithmetic number, because the mean of its divisors is an integer number (22766264640).

Almost surely, 2^394578199834 is an apocalyptic number.

394578199834 is a deficient number, since it is larger than the sum of its proper divisors (333942268646).

394578199834 is a wasteful number, since it uses less digits than its factorization.

394578199834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203614.

The product of its digits is 235146240, while the sum is 70.

The spelling of 394578199834 in words is "three hundred ninety-four billion, five hundred seventy-eight million, one hundred ninety-nine thousand, eight hundred thirty-four".