394706858049 has 27 divisors (see below), whose sum is σ = 663237093987. Its totient is φ = 225539236944.

The previous prime is 394706858027. The next prime is 394706858057. The reversal of 394706858049 is 940858607493.

The square root of 394706858049 is 628257.

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

394706858049 is a `hidden beast` number, since 3 + 9 + 4 + 7 + 0 + 6 + 8 + 580 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 359838018225 + 34868839824 = 599865^2 + 186732^2 .

It is not a de Polignac number, because 394706858049 - 2¹⁷ = 394706726977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (394706858069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13178439 + ... + 13208355.

Almost surely, 2^394706858049 is an apocalyptic number.

394706858049 is the 628257-th square number.

394706858049 is the 314129-th centered octagonal number.

It is an amenable number.

394706858049 is a deficient number, since it is larger than the sum of its proper divisors (268530235938).

394706858049 is an frugal number, since it uses more digits than its factorization.

394706858049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59854 (or 29927 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 394706858049 in words is "three hundred ninety-four billion, seven hundred six million, eight hundred fifty-eight thousand, forty-nine".