394248363664 has 45 divisors (see below), whose sum is σ = 774037214307. Its totient is φ = 194530987872.

The previous prime is 394248363653. The next prime is 394248363703. The reversal of 394248363664 is 466363842493.

The square root of 394248363664 is 627892.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394248363599 and 394248363608.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 198412879 + ... + 198414865.

Almost surely, 2^394248363664 is an apocalyptic number.

394248363664 is the 627892-nd square number.

It is an amenable number.

394248363664 is a deficient number, since it is larger than the sum of its proper divisors (379788850643).

394248363664 is an frugal number, since it uses more digits than its factorization.

394248363664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140 (or 2068 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 58.

The spelling of 394248363664 in words is "three hundred ninety-four billion, two hundred forty-eight million, three hundred sixty-three thousand, six hundred sixty-four".