394071889568 has 48 divisors (see below), whose sum is σ = 925212274560. Its totient is φ = 161544996096.

The previous prime is 394071889567. The next prime is 394071889597. The reversal of 394071889568 is 865988170493.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 394071889498 and 394071889507.

It is not an unprimeable number, because it can be changed into a prime (394071889567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38239403 + ... + 38249706.

It is an arithmetic number, because the mean of its divisors is an integer number (19275255720).

Almost surely, 2^394071889568 is an apocalyptic number.

It is an amenable number.

394071889568 is an abundant number, since it is smaller than the sum of its proper divisors (531140384992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394071889568 is a wasteful number, since it uses less digits than its factorization.

394071889568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76489149 (or 76489141 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 394071889568 in words is "three hundred ninety-four billion, seventy-one million, eight hundred eighty-nine thousand, five hundred sixty-eight".