394959457764 has 27 divisors (see below), whose sum is σ = 998379272163. Its totient is φ = 131651895672.

The previous prime is 394959457747. The next prime is 394959457769. The reversal of 394959457764 is 467754959493.

The square root of 394959457764 is 628458.

It is a perfect power (a square), and thus also a powerful number.

394959457764 is a `hidden beast` number, since 3 + 9 + 49 + 5 + 9 + 4 + 577 + 6 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 394959457692 and 394959457701.

It is not an unprimeable number, because it can be changed into a prime (394959457769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3718377 + ... + 3823119.

Almost surely, 2^394959457764 is an apocalyptic number.

394959457764 is the 628458-th square number.

It is an amenable number.

394959457764 is an abundant number, since it is smaller than the sum of its proper divisors (603419814399).

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

394959457764 is an frugal number, since it uses more digits than its factorization.

394959457764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209496 (or 104748 counting only the distinct ones).

The product of its digits is 1028764800, while the sum is 72.

The spelling of 394959457764 in words is "three hundred ninety-four billion, nine hundred fifty-nine million, four hundred fifty-seven thousand, seven hundred sixty-four".