389005056 has 108 divisors (see below), whose sum is σ = 1223640600. Its totient is φ = 117872640.

The previous prime is 389005009. The next prime is 389005073. The reversal of 389005056 is 650500983.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 389005056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17670 + ... + 33018.

Almost surely, 2^389005056 is an apocalyptic number.

389005056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389005056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (611820300).

389005056 is an abundant number, since it is smaller than the sum of its proper divisors (834635544).

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

389005056 is a wasteful number, since it uses less digits than its factorization.

389005056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15382 (or 15365 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 389005056 is about 19723.2110975875. The cubic root of 389005056 is about 729.9925288533.

It can be divided in two parts, 38900 and 5056, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 389005056 in words is "three hundred eighty-nine million, five thousand, fifty-six".