320704736447394 has 384 divisors, whose sum is σ = 801536230010880. Its totient is φ = 91855735603200.

The previous prime is 320704736447363. The next prime is 320704736447401. The reversal of 320704736447394 is 493744637407023.

320704736447394 is a `hidden beast` number, since 3 + 2 + 0 + 7 + 0 + 4 + 73 + 6 + 4 + 473 + 94 = 666.

It is a super-2 number, since 2×320704736447394² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 64102483297 + ... + 64102488299.

It is an arithmetic number, because the mean of its divisors is an integer number (2087333932320).

Almost surely, 2^{320704736447394} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320704736447394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400768115005440).

320704736447394 is an abundant number, since it is smaller than the sum of its proper divisors (480831493563486).

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

320704736447394 is a wasteful number, since it uses less digits than its factorization.

320704736447394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038 (or 6035 counting only the distinct ones).

The product of its (nonzero) digits is 256048128, while the sum is 63.

The spelling of 320704736447394 in words is "three hundred twenty trillion, seven hundred four billion, seven hundred thirty-six million, four hundred forty-seven thousand, three hundred ninety-four".