389963866 has 16 divisors (see below), whose sum is σ = 616131360. Its totient is φ = 184600080.

The previous prime is 389963857. The next prime is 389963869. The reversal of 389963866 is 668369983.

It is a self number, because there is not a number n which added to its sum of digits gives 389963866.

It is not an unprimeable number, because it can be changed into a prime (389963869) 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, 90501 + ... + 94711.

It is an arithmetic number, because the mean of its divisors is an integer number (38508210).

Almost surely, 2^389963866 is an apocalyptic number.

389963866 is a deficient number, since it is larger than the sum of its proper divisors (226167494).

389963866 is a wasteful number, since it uses less digits than its factorization.

389963866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669.

The product of its digits is 10077696, while the sum is 58.

The square root of 389963866 is about 19747.5027788326. The cubic root of 389963866 is about 730.5917925904.

The spelling of 389963866 in words is "three hundred eighty-nine million, nine hundred sixty-three thousand, eight hundred sixty-six".