394800646624 has 48 divisors (see below), whose sum is σ = 796672709280. Its totient is φ = 192476528640.

The previous prime is 394800646621. The next prime is 394800646627. The reversal of 394800646624 is 426646008493.

It is an interprime number because it is at equal distance from previous prime (394800646621) and next prime (394800646627).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394800646621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2254912 + ... + 2423680.

It is an arithmetic number, because the mean of its divisors is an integer number (16597348110).

Almost surely, 2^394800646624 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 394800646624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398336354640).

394800646624 is an abundant number, since it is smaller than the sum of its proper divisors (401872062656).

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

394800646624 is a wasteful number, since it uses less digits than its factorization.

394800646624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170603 (or 170595 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 394800646624 in words is "three hundred ninety-four billion, eight hundred million, six hundred forty-six thousand, six hundred twenty-four".