389916986 has 8 divisors (see below), whose sum is σ = 585036480. Its totient is φ = 194904828.

The previous prime is 389916979. The next prime is 389916997. The reversal of 389916986 is 689619983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

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, 17036 + ... + 32711.

It is an arithmetic number, because the mean of its divisors is an integer number (73129560).

Almost surely, 2^389916986 is an apocalyptic number.

389916986 is a deficient number, since it is larger than the sum of its proper divisors (195119494).

389916986 is a wasteful number, since it uses less digits than its factorization.

389916986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53668.

The product of its digits is 5038848, while the sum is 59.

The square root of 389916986 is about 19746.3157576293. The cubic root of 389916986 is about 730.5625150780.

The spelling of 389916986 in words is "three hundred eighty-nine million, nine hundred sixteen thousand, nine hundred eighty-six".