389218284 has 240 divisors, whose sum is σ = 1285596928. Its totient is φ = 99937152.

The previous prime is 389218283. The next prime is 389218337. The reversal of 389218284 is 482812983.

It is not an unprimeable number, because it can be changed into a prime (389218283) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1267659 + ... + 1267965.

Almost surely, 2^389218284 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 389218284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642798464).

389218284 is an abundant number, since it is smaller than the sum of its proper divisors (896378644).

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

389218284 is a wasteful number, since it uses less digits than its factorization.

389218284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 375 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 389218284 is about 19728.6158662994. The cubic root of 389218284 is about 730.1258830888.

The spelling of 389218284 in words is "three hundred eighty-nine million, two hundred eighteen thousand, two hundred eighty-four".