389905006 has 4 divisors (see below), whose sum is σ = 584857512. Its totient is φ = 194952502.

The previous prime is 389905003. The next prime is 389905007. The reversal of 389905006 is 600509983.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 389905006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389905003) 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 as a sum of consecutive naturals, namely, 97476250 + ... + 97476253.

It is an arithmetic number, because the mean of its divisors is an integer number (146214378).

Almost surely, 2^389905006 is an apocalyptic number.

389905006 is a deficient number, since it is larger than the sum of its proper divisors (194952506).

389905006 is a wasteful number, since it uses less digits than its factorization.

389905006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194952505.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 389905006 is about 19746.0124075723. The cubic root of 389905006 is about 730.5550329481. Note that the first 3 decimals are identical.

The spelling of 389905006 in words is "three hundred eighty-nine million, nine hundred five thousand, six".