394486309 has 24 divisors (see below), whose sum is σ = 489525120. Its totient is φ = 315858816.

The previous prime is 394486283. The next prime is 394486321. The reversal of 394486309 is 903684493.

It is not a de Polignac number, because 394486309 - 2¹¹ = 394484261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394486349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114084 + ... + 117490.

It is an arithmetic number, because the mean of its divisors is an integer number (20396880).

Almost surely, 2^394486309 is an apocalyptic number.

It is an amenable number.

394486309 is a deficient number, since it is larger than the sum of its proper divisors (95038811).

394486309 is a wasteful number, since it uses less digits than its factorization.

394486309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577 (or 3570 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 394486309 is about 19861.6794103621. The cubic root of 394486309 is about 733.4051890793.

The spelling of 394486309 in words is "three hundred ninety-four million, four hundred eighty-six thousand, three hundred nine".