389984250 has 128 divisors (see below), whose sum is σ = 1047271680. Its totient is φ = 96307200.

The previous prime is 389984209. The next prime is 389984263. The reversal of 389984250 is 52489983.

It is a self number, because there is not a number n which added to its sum of digits gives 389984250.

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, 930541 + ... + 930959.

It is an arithmetic number, because the mean of its divisors is an integer number (8181810).

Almost surely, 2^389984250 is an apocalyptic number.

389984250 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 389984250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523635840).

389984250 is an abundant number, since it is smaller than the sum of its proper divisors (657287430).

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

389984250 is a wasteful number, since it uses less digits than its factorization.

389984250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 389984250 is about 19748.0188879796. The cubic root of 389984250 is about 730.6045220806.

The spelling of 389984250 in words is "three hundred eighty-nine million, nine hundred eighty-four thousand, two hundred fifty".