389320387 has 4 divisors (see below), whose sum is σ = 389361256. Its totient is φ = 389279520.

The previous prime is 389320339. The next prime is 389320403. The reversal of 389320387 is 783023983.

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 is a cyclic number.

It is not a de Polignac number, because 389320387 - 2¹¹ = 389318339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389320307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2248 + ... + 27994.

It is an arithmetic number, because the mean of its divisors is an integer number (97340314).

Almost surely, 2^389320387 is an apocalyptic number.

389320387 is a deficient number, since it is larger than the sum of its proper divisors (40869).

389320387 is a wasteful number, since it uses less digits than its factorization.

389320387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40868.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 389320387 is about 19731.2033844872. The cubic root of 389320387 is about 730.1897217524.

The spelling of 389320387 in words is "three hundred eighty-nine million, three hundred twenty thousand, three hundred eighty-seven".