389542865 has 8 divisors (see below), whose sum is σ = 467778048. Its totient is φ = 311416560.

The previous prime is 389542861. The next prime is 389542939. The reversal of 389542865 is 568245983.

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

It is not a de Polignac number, because 389542865 - 2² = 389542861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389542861) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19127 + ... + 33836.

It is an arithmetic number, because the mean of its divisors is an integer number (58472256).

Almost surely, 2^389542865 is an apocalyptic number.

It is an amenable number.

389542865 is a deficient number, since it is larger than the sum of its proper divisors (78235183).

389542865 is a wasteful number, since it uses less digits than its factorization.

389542865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54439.

The product of its digits is 2073600, while the sum is 50.

The square root of 389542865 is about 19736.8402992982. The cubic root of 389542865 is about 730.3287847793.

The spelling of 389542865 in words is "three hundred eighty-nine million, five hundred forty-two thousand, eight hundred sixty-five".