389408256 has 160 divisors (see below), whose sum is σ = 1221216480. Its totient is φ = 122093568.

The previous prime is 389408209. The next prime is 389408269. The reversal of 389408256 is 652804983.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 234180 + ... + 235836.

It is an arithmetic number, because the mean of its divisors is an integer number (7632603).

Almost surely, 2^389408256 is an apocalyptic number.

389408256 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 389408256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610608240).

389408256 is an abundant number, since it is smaller than the sum of its proper divisors (831808224).

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

389408256 is a wasteful number, since it uses less digits than its factorization.

389408256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 389408256 is about 19733.4299096736. The cubic root of 389408256 is about 730.2446518446.

The spelling of 389408256 in words is "three hundred eighty-nine million, four hundred eight thousand, two hundred fifty-six".