394381861 has 8 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 370561728.

The previous prime is 394381847. The next prime is 394381903. The reversal of 394381861 is 168183493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394381861 - 2¹¹ = 394379813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394381811) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 8791 + ... + 29428.

It is an arithmetic number, because the mean of its divisors is an integer number (52284960).

Almost surely, 2^394381861 is an apocalyptic number.

It is an amenable number.

394381861 is a deficient number, since it is larger than the sum of its proper divisors (23897819).

394381861 is a wasteful number, since it uses less digits than its factorization.

394381861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38843.

The product of its digits is 124416, while the sum is 43.

The square root of 394381861 is about 19859.0498513902. The cubic root of 394381861 is about 733.3404555553.

The spelling of 394381861 in words is "three hundred ninety-four million, three hundred eighty-one thousand, eight hundred sixty-one".