389826816 has 144 divisors (see below), whose sum is σ = 1121420160. Its totient is φ = 119848960.

The previous prime is 389826803. The next prime is 389826821. The reversal of 389826816 is 618628983.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511876 + ... + 512636.

It is an arithmetic number, because the mean of its divisors is an integer number (7787640).

Almost surely, 2^389826816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389826816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560710080).

389826816 is an abundant number, since it is smaller than the sum of its proper divisors (731593344).

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

389826816 is a wasteful number, since it uses less digits than its factorization.

389826816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 818 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 389826816 is about 19744.0324148843. The cubic root of 389826816 is about 730.5061954827.

The spelling of 389826816 in words is "three hundred eighty-nine million, eight hundred twenty-six thousand, eight hundred sixteen".