389867715 has 64 divisors (see below), whose sum is σ = 737838720. Its totient is φ = 194641920.

The previous prime is 389867711. The next prime is 389867717. The reversal of 389867715 is 517768983.

It is not a de Polignac number, because 389867715 - 2² = 389867711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389867711) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 589485 + ... + 590145.

It is an arithmetic number, because the mean of its divisors is an integer number (11528730).

Almost surely, 2^389867715 is an apocalyptic number.

389867715 is a deficient number, since it is larger than the sum of its proper divisors (347971005).

389867715 is a wasteful number, since it uses less digits than its factorization.

389867715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 943 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 389867715 is about 19745.0681183935. The cubic root of 389867715 is about 730.5317418081.

The spelling of 389867715 in words is "three hundred eighty-nine million, eight hundred sixty-seven thousand, seven hundred fifteen".