394658397952 has 288 divisors, whose sum is σ = 987979991040. Its totient is φ = 153187614720.

The previous prime is 394658397949. The next prime is 394658397967. The reversal of 394658397952 is 259793856493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406444827 + ... + 406445797.

It is an arithmetic number, because the mean of its divisors is an integer number (3430486080).

Almost surely, 2^394658397952 is an apocalyptic number.

394658397952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394658397952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493989995520).

394658397952 is an abundant number, since it is smaller than the sum of its proper divisors (593321593088).

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

394658397952 is a wasteful number, since it uses less digits than its factorization.

394658397952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1305 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 70.

The spelling of 394658397952 in words is "three hundred ninety-four billion, six hundred fifty-eight million, three hundred ninety-seven thousand, nine hundred fifty-two".