389998256 has 40 divisors (see below), whose sum is σ = 802500720. Its totient is φ = 183085056.

The previous prime is 389998253. The next prime is 389998289. The reversal of 389998256 is 652899983.

It is a junction number, because it is equal to n+sod(n) for n = 389998195 and 389998204.

It is not an unprimeable number, because it can be changed into a prime (389998253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28676 + ... + 40028.

It is an arithmetic number, because the mean of its divisors is an integer number (20062518).

Almost surely, 2^389998256 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 389998256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401250360).

389998256 is an abundant number, since it is smaller than the sum of its proper divisors (412502464).

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

389998256 is a wasteful number, since it uses less digits than its factorization.

389998256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493 (or 11487 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 59.

The square root of 389998256 is about 19748.3735026457. The cubic root of 389998256 is about 730.6132683521.

The spelling of 389998256 in words is "three hundred eighty-nine million, nine hundred ninety-eight thousand, two hundred fifty-six".