389423686 has 4 divisors (see below), whose sum is σ = 584135532. Its totient is φ = 194711842.

The previous prime is 389423653. The next prime is 389423689. The reversal of 389423686 is 686324983.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389423689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97355920 + ... + 97355923.

It is an arithmetic number, because the mean of its divisors is an integer number (146033883).

Almost surely, 2^389423686 is an apocalyptic number.

389423686 is a deficient number, since it is larger than the sum of its proper divisors (194711846).

389423686 is a wasteful number, since it uses less digits than its factorization.

389423686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194711845.

The product of its digits is 1492992, while the sum is 49.

The square root of 389423686 is about 19733.8208667252. The cubic root of 389423686 is about 730.2542968431.

The spelling of 389423686 in words is "three hundred eighty-nine million, four hundred twenty-three thousand, six hundred eighty-six".