389968019 has 10 divisors (see below), whose sum is σ = 454938420. Its totient is φ = 334256244.

The previous prime is 389967983. The next prime is 389968021. The reversal of 389968019 is 910869983.

It is a de Polignac number, because none of the positive numbers 2^k-389968019 is a prime.

It is a super-2 number, since 2×389968019² = 304150111685568722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389968619) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78809 + ... + 83610.

It is an arithmetic number, because the mean of its divisors is an integer number (45493842).

Almost surely, 2^389968019 is an apocalyptic number.

389968019 is a deficient number, since it is larger than the sum of its proper divisors (64970401).

389968019 is an frugal number, since it uses more digits than its factorization.

389968019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162447 (or 162426 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 389968019 is about 19747.6079310888. The cubic root of 389968019 is about 730.5943861101.

The spelling of 389968019 in words is "three hundred eighty-nine million, nine hundred sixty-eight thousand, nineteen".