394940263792 has 20 divisors (see below), whose sum is σ = 781477544736. Its totient is φ = 193268639360.

The previous prime is 394940263709. The next prime is 394940263793. The reversal of 394940263792 is 297362049493.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394940263793) 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, 262592509 + ... + 262594012.

Almost surely, 2^394940263792 is an apocalyptic number.

It is an amenable number.

394940263792 is a deficient number, since it is larger than the sum of its proper divisors (386537280944).

394940263792 is a wasteful number, since it uses less digits than its factorization.

394940263792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525186576 (or 525186570 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 58.

The spelling of 394940263792 in words is "three hundred ninety-four billion, nine hundred forty million, two hundred sixty-three thousand, seven hundred ninety-two".