394063638528 has 312 divisors, whose sum is σ = 1242404982480. Its totient is φ = 110733557760.

The previous prime is 394063638497. The next prime is 394063638547. The reversal of 394063638528 is 825836360493.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36723468 + ... + 36734196.

Almost surely, 2^394063638528 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 394063638528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621202491240).

394063638528 is an abundant number, since it is smaller than the sum of its proper divisors (848341343952).

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

394063638528 is a wasteful number, since it uses less digits than its factorization.

394063638528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831 (or 10802 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 57.

The spelling of 394063638528 in words is "three hundred ninety-four billion, sixty-three million, six hundred thirty-eight thousand, five hundred twenty-eight".