394390618288 has 20 divisors (see below), whose sum is σ = 764170319880. Its totient is φ = 197185374464.

The previous prime is 394390618247. The next prime is 394390618333. The reversal of 394390618288 is 882816093493.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 287998 + ... + 933661.

It is an arithmetic number, because the mean of its divisors is an integer number (38208515994).

Almost surely, 2^394390618288 is an apocalyptic number.

It is an amenable number.

394390618288 is a deficient number, since it is larger than the sum of its proper divisors (369779701592).

394390618288 is a wasteful number, since it uses less digits than its factorization.

394390618288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241844 (or 1241838 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 394390618288 in words is "three hundred ninety-four billion, three hundred ninety million, six hundred eighteen thousand, two hundred eighty-eight".