389988066 has 32 divisors (see below), whose sum is σ = 862682688. Its totient is φ = 116752320.

The previous prime is 389988059. The next prime is 389988073. The reversal of 389988066 is 660889983.

It is an interprime number because it is at equal distance from previous prime (389988059) and next prime (389988073).

It is a junction number, because it is equal to n+sod(n) for n = 389987997 and 389988015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64680 + ... + 70451.

It is an arithmetic number, because the mean of its divisors is an integer number (26958834).

Almost surely, 2^389988066 is an apocalyptic number.

389988066 is an abundant number, since it is smaller than the sum of its proper divisors (472694622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389988066 is a wasteful number, since it uses less digits than its factorization.

389988066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135186.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 389988066 is about 19748.1155050298. The cubic root of 389988066 is about 730.6069050638.

The spelling of 389988066 in words is "three hundred eighty-nine million, nine hundred eighty-eight thousand, sixty-six".