394444054686 has 32 divisors (see below), whose sum is σ = 872726420736. Its totient is φ = 117845000000.

The previous prime is 394444054681. The next prime is 394444054721. The reversal of 394444054686 is 686450444493.

It is a happy number.

It is a super-2 number, since 2×394444054686² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394444054681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42082815 + ... + 42092186.

It is an arithmetic number, because the mean of its divisors is an integer number (27272700648).

Almost surely, 2^394444054686 is an apocalyptic number.

394444054686 is an abundant number, since it is smaller than the sum of its proper divisors (478282366050).

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

394444054686 is a wasteful number, since it uses less digits than its factorization.

394444054686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84175088.

The product of its (nonzero) digits is 39813120, while the sum is 57.

The spelling of 394444054686 in words is "three hundred ninety-four billion, four hundred forty-four million, fifty-four thousand, six hundred eighty-six".