394543403904 has 256 divisors, whose sum is σ = 1160551022400. Its totient is φ = 118006087680.

The previous prime is 394543403867. The next prime is 394543403911. The reversal of 394543403904 is 409304345493.

394543403904 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28831944 + ... + 28845624.

Almost surely, 2^394543403904 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 394543403904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580275511200).

394543403904 is an abundant number, since it is smaller than the sum of its proper divisors (766007618496).

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

394543403904 is a wasteful number, since it uses less digits than its factorization.

394543403904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13873 (or 13861 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 394543403904 in words is "three hundred ninety-four billion, five hundred forty-three million, four hundred three thousand, nine hundred four".