394302891648 has 128 divisors (see below), whose sum is σ = 1110342738240. Its totient is φ = 123550515200.

The previous prime is 394302891643. The next prime is 394302891677. The reversal of 394302891648 is 846198203493.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (394302891643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5322703 + ... + 5396273.

Almost surely, 2^394302891648 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 394302891648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555171369120).

394302891648 is an abundant number, since it is smaller than the sum of its proper divisors (716039846592).

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

394302891648 is a wasteful number, since it uses less digits than its factorization.

394302891648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74426 (or 74414 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 394302891648 in words is "three hundred ninety-four billion, three hundred two million, eight hundred ninety-one thousand, six hundred forty-eight".