394204779696 has 1280 divisors, whose sum is σ = 1439907840000. Its totient is φ = 91933470720.

The previous prime is 394204779679. The next prime is 394204779707. The reversal of 394204779696 is 696977402493.

394204779696 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 6681436915 + ... + 6681436973.

It is an arithmetic number, because the mean of its divisors is an integer number (1124928000).

Almost surely, 2^394204779696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394204779696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719953920000).

394204779696 is an abundant number, since it is smaller than the sum of its proper divisors (1045703060304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394204779696 is a wasteful number, since it uses less digits than its factorization.

394204779696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 66.

The spelling of 394204779696 in words is "three hundred ninety-four billion, two hundred four million, seven hundred seventy-nine thousand, six hundred ninety-six".