394009522 has 8 divisors (see below), whose sum is σ = 606987756. Its totient is φ = 191680272.

The previous prime is 394009519. The next prime is 394009523. The reversal of 394009522 is 225900493.

It can be written as a sum of positive squares in 2 ways, for example, as 368294481 + 25715041 = 19191^2 + 5071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (394009523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2662153 + ... + 2662300.

Almost surely, 2^394009522 is an apocalyptic number.

394009522 is a deficient number, since it is larger than the sum of its proper divisors (212978234).

394009522 is a wasteful number, since it uses less digits than its factorization.

394009522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324492.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 394009522 is about 19849.6730955449. The cubic root of 394009522 is about 733.1095987352.

The spelling of 394009522 in words is "three hundred ninety-four million, nine thousand, five hundred twenty-two".