389445931 has 8 divisors (see below), whose sum is σ = 446602464. Its totient is φ = 332669760.

The previous prime is 389445893. The next prime is 389445941. The reversal of 389445931 is 139544983.

It is a happy number.

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 389445931 - 2¹¹ = 389443883 is a prime.

It is a super-4 number, since 4×389445931⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (389445941) 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 7 ways as a sum of consecutive naturals, for example, 92890 + ... + 96991.

It is an arithmetic number, because the mean of its divisors is an integer number (55825308).

Almost surely, 2^389445931 is an apocalyptic number.

389445931 is a deficient number, since it is larger than the sum of its proper divisors (57156533).

389445931 is a wasteful number, since it uses less digits than its factorization.

389445931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190181.

The product of its digits is 466560, while the sum is 46.

The square root of 389445931 is about 19734.3844849542. The cubic root of 389445931 is about 730.2682013197.

The spelling of 389445931 in words is "three hundred eighty-nine million, four hundred forty-five thousand, nine hundred thirty-one".