394388659876 has 12 divisors (see below), whose sum is σ = 691020818460. Its totient is φ = 196954140320.

The previous prime is 394388659801. The next prime is 394388659879. The reversal of 394388659876 is 678956883493.

It can be written as a sum of positive squares in 2 ways, for example, as 55168614400 + 339220045476 = 234880^2 + 582426^2 .

It is not an unprimeable number, because it can be changed into a prime (394388659879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60043711 + ... + 60050278.

It is an arithmetic number, because the mean of its divisors is an integer number (57585068205).

Almost surely, 2^394388659876 is an apocalyptic number.

It is an amenable number.

394388659876 is a deficient number, since it is larger than the sum of its proper divisors (296632158584).

394388659876 is a wasteful number, since it uses less digits than its factorization.

394388659876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120094814 (or 120094812 counting only the distinct ones).

The product of its digits is 1881169920, while the sum is 76.

The spelling of 394388659876 in words is "three hundred ninety-four billion, three hundred eighty-eight million, six hundred fifty-nine thousand, eight hundred seventy-six".