389918256 has 320 divisors, whose sum is σ = 1349913600. Its totient is φ = 94076928.

The previous prime is 389918237. The next prime is 389918261. The reversal of 389918256 is 652819983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 389918199 and 389918208.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4381060 + ... + 4381148.

It is an arithmetic number, because the mean of its divisors is an integer number (4218480).

Almost surely, 2^389918256 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 389918256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674956800).

389918256 is an abundant number, since it is smaller than the sum of its proper divisors (959995344).

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

389918256 is a wasteful number, since it uses less digits than its factorization.

389918256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 190 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 389918256 is about 19746.3479155007. The cubic root of 389918256 is about 730.5633082497.

It can be divided in two parts, 3899 and 18256, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 389918256 in words is "three hundred eighty-nine million, nine hundred eighteen thousand, two hundred fifty-six".