394249255168 has 72 divisors (see below), whose sum is σ = 796415268600. Its totient is φ = 194759245824.

The previous prime is 394249255159. The next prime is 394249255171. The reversal of 394249255168 is 861552942493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76910819584 + 317338435584 = 277328^2 + 563328^2 .

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 7 ways as a sum of consecutive naturals, for example, 33099198 + ... + 33111106.

It is an arithmetic number, because the mean of its divisors is an integer number (11061323175).

Almost surely, 2^394249255168 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 394249255168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398207634300).

394249255168 is an abundant number, since it is smaller than the sum of its proper divisors (402166013432).

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

394249255168 is a wasteful number, since it uses less digits than its factorization.

394249255168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13467 (or 13453 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 58.

The spelling of 394249255168 in words is "three hundred ninety-four billion, two hundred forty-nine million, two hundred fifty-five thousand, one hundred sixty-eight".