389658809 has 8 divisors (see below), whose sum is σ = 409819392. Its totient is φ = 369972720.

The previous prime is 389658781. The next prime is 389658823. The reversal of 389658809 is 908856983.

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 389658809 - 2¹⁶ = 389593273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389658869) 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, 116939 + ... + 120224.

It is an arithmetic number, because the mean of its divisors is an integer number (51227424).

Almost surely, 2^389658809 is an apocalyptic number.

It is an amenable number.

389658809 is a deficient number, since it is larger than the sum of its proper divisors (20160583).

389658809 is a wasteful number, since it uses less digits than its factorization.

389658809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237247.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 389658809 is about 19739.7773290379. Note that the first 3 decimals coincide. The cubic root of 389658809 is about 730.4012362333.

It can be divided in two parts, 38965 and 8809, that added together give a palindrome (47774).

The spelling of 389658809 in words is "three hundred eighty-nine million, six hundred fifty-eight thousand, eight hundred nine".