389788849 has 4 divisors (see below), whose sum is σ = 389828340. Its totient is φ = 389749360.

The previous prime is 389788807. The next prime is 389788853. The reversal of 389788849 is 948887983.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 67765824 + 322023025 = 8232^2 + 17945^2 .

It is a cyclic number.

It is not a de Polignac number, because 389788849 - 2²³ = 381400241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389788859) 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, 9459 + ... + 29479.

It is an arithmetic number, because the mean of its divisors is an integer number (97457085).

Almost surely, 2^389788849 is an apocalyptic number.

It is an amenable number.

389788849 is a deficient number, since it is larger than the sum of its proper divisors (39491).

389788849 is a wasteful number, since it uses less digits than its factorization.

389788849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39490.

The product of its digits is 27869184, while the sum is 64.

The square root of 389788849 is about 19743.0709110817. The cubic root of 389788849 is about 730.4824789432.

The spelling of 389788849 in words is "three hundred eighty-nine million, seven hundred eighty-eight thousand, eight hundred forty-nine".