394888641 has 8 divisors (see below), whose sum is σ = 601735104. Its totient is φ = 225650640.

The previous prime is 394888619. The next prime is 394888643. The reversal of 394888641 is 146888493.

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

It is not a de Polignac number, because 394888641 - 2⁶ = 394888577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394888643) 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, 9402090 + ... + 9402131.

It is an arithmetic number, because the mean of its divisors is an integer number (75216888).

Almost surely, 2^394888641 is an apocalyptic number.

It is an amenable number.

394888641 is a deficient number, since it is larger than the sum of its proper divisors (206846463).

394888641 is a wasteful number, since it uses less digits than its factorization.

394888641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18804231.

The product of its digits is 1327104, while the sum is 51.

The square root of 394888641 is about 19871.8051771851. The cubic root of 394888641 is about 733.6544348393.

The spelling of 394888641 in words is "three hundred ninety-four million, eight hundred eighty-eight thousand, six hundred forty-one".