394857424 has 20 divisors (see below), whose sum is σ = 823885636. Its totient is φ = 182241792.

The previous prime is 394857413. The next prime is 394857461. The reversal of 394857424 is 424758493.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 149621824 + 245235600 = 12232^2 + 15660^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 948969 + ... + 949384.

Almost surely, 2^394857424 is an apocalyptic number.

It is an amenable number.

394857424 is an abundant number, since it is smaller than the sum of its proper divisors (429028212).

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

394857424 is a wasteful number, since it uses less digits than its factorization.

394857424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898374 (or 1898368 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 394857424 is about 19871.0197020686. The cubic root of 394857424 is about 733.6351018834.

The spelling of 394857424 in words is "three hundred ninety-four million, eight hundred fifty-seven thousand, four hundred twenty-four".