389843928 has 96 divisors (see below), whose sum is σ = 1142668800. Its totient is φ = 124283808.

The previous prime is 389843903. The next prime is 389843939. The reversal of 389843928 is 829348983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40353 + ... + 49071.

It is an arithmetic number, because the mean of its divisors is an integer number (11902800).

Almost surely, 2^389843928 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 389843928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571334400).

389843928 is an abundant number, since it is smaller than the sum of its proper divisors (752824872).

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

389843928 is a wasteful number, since it uses less digits than its factorization.

389843928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763 (or 8747 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 389843928 is about 19744.4657562569. The cubic root of 389843928 is about 730.5168841942.

The spelling of 389843928 in words is "three hundred eighty-nine million, eight hundred forty-three thousand, nine hundred twenty-eight".