394895305728 has 1320 divisors, whose sum is σ = 1529504873424. Its totient is φ = 101165137920.

The previous prime is 394895305669. The next prime is 394895305747. The reversal of 394895305728 is 827503598493.

394895305728 is a `hidden beast` number, since 3 + 9 + 4 + 8 + 9 + 53 + 0 + 572 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5409524700 + ... + 5409524772.

Almost surely, 2^394895305728 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 394895305728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764752436712).

394895305728 is an abundant number, since it is smaller than the sum of its proper divisors (1134609567696).

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

394895305728 is an equidigital number, since it uses as much as digits as its factorization.

394895305728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 394895305728 in words is "three hundred ninety-four billion, eight hundred ninety-five million, three hundred five thousand, seven hundred twenty-eight".