394847889408 has 576 divisors, whose sum is σ = 1392647256000. Its totient is φ = 110157594624.

The previous prime is 394847889377. The next prime is 394847889433. The reversal of 394847889408 is 804988748493.

394847889408 is a `hidden beast` number, since 39 + 4 + 8 + 478 + 89 + 40 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116506978 + ... + 116510366.

It is an arithmetic number, because the mean of its divisors is an integer number (2417790375).

Almost surely, 2^394847889408 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 394847889408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696323628000).

394847889408 is an abundant number, since it is smaller than the sum of its proper divisors (997799366592).

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

394847889408 is a wasteful number, since it uses less digits than its factorization.

394847889408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477 (or 3444 counting only the distinct ones).

The product of its (nonzero) digits is 445906944, while the sum is 72.

The spelling of 394847889408 in words is "three hundred ninety-four billion, eight hundred forty-seven million, eight hundred eighty-nine thousand, four hundred eight".