394329389 has 8 divisors (see below), whose sum is σ = 403834368. Its totient is φ = 384870960.

The previous prime is 394329361. The next prime is 394329407. The reversal of 394329389 is 983923493.

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

It is a cyclic number.

It is not a de Polignac number, because 394329389 - 2¹⁶ = 394263853 is a prime.

It is a super-2 number, since 2×394329389² = 310991334058226642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394329329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5819 + ... + 28679.

It is an arithmetic number, because the mean of its divisors is an integer number (50479296).

Almost surely, 2^394329389 is an apocalyptic number.

It is an amenable number.

394329389 is a deficient number, since it is larger than the sum of its proper divisors (9504979).

394329389 is a wasteful number, since it uses less digits than its factorization.

394329389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23275.

The product of its digits is 1259712, while the sum is 50.

The square root of 394329389 is about 19857.7286969079. The cubic root of 394329389 is about 733.3079307776.

The spelling of 394329389 in words is "three hundred ninety-four million, three hundred twenty-nine thousand, three hundred eighty-nine".