389963856 has 20 divisors (see below), whose sum is σ = 1007406752. Its totient is φ = 129987936.

The previous prime is 389963837. The next prime is 389963857. The reversal of 389963856 is 658369983.

It is a junction number, because it is equal to n+sod(n) for n = 389963796 and 389963805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389963857) 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 in 3 ways as a sum of consecutive naturals, for example, 4062076 + ... + 4062171.

Almost surely, 2^389963856 is an apocalyptic number.

It is an amenable number.

389963856 is an abundant number, since it is smaller than the sum of its proper divisors (617442896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389963856 is a wasteful number, since it uses less digits than its factorization.

389963856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124258 (or 8124252 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 57.

The square root of 389963856 is about 19747.5025256360. The cubic root of 389963856 is about 730.5917863455.

The spelling of 389963856 in words is "three hundred eighty-nine million, nine hundred sixty-three thousand, eight hundred fifty-six".