389805689 has 16 divisors (see below), whose sum is σ = 483278208. Its totient is φ = 306156672.

The previous prime is 389805683. The next prime is 389805697. The reversal of 389805689 is 986508983.

It is a cyclic number.

It is not a de Polignac number, because 389805689 - 2¹² = 389801593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389805683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3167 + ... + 28100.

It is an arithmetic number, because the mean of its divisors is an integer number (30204888).

Almost surely, 2^389805689 is an apocalyptic number.

It is an amenable number.

389805689 is a deficient number, since it is larger than the sum of its proper divisors (93472519).

389805689 is a wasteful number, since it uses less digits than its factorization.

389805689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31424.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 389805689 is about 19743.4973852152. The cubic root of 389805689 is about 730.4929984401.

The spelling of 389805689 in words is "three hundred eighty-nine million, eight hundred five thousand, six hundred eighty-nine".