384865218 has 24 divisors (see below), whose sum is σ = 834374268. Its totient is φ = 128211552.

The previous prime is 384865213. The next prime is 384865259. The reversal of 384865218 is 812568483.

It can be written as a sum of positive squares in 2 ways, for example, as 350326089 + 34539129 = 18717^2 + 5877^2 .

It is not an unprimeable number, because it can be changed into a prime (384865211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30096 + ... + 40932.

Almost surely, 2^384865218 is an apocalyptic number.

384865218 is an abundant number, since it is smaller than the sum of its proper divisors (449509050).

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

384865218 is a wasteful number, since it uses less digits than its factorization.

384865218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12818 (or 12815 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 384865218 is about 19617.9820063125. The cubic root of 384865218 is about 727.3937323081.

The spelling of 384865218 in words is "three hundred eighty-four million, eight hundred sixty-five thousand, two hundred eighteen".