2815868384 has 144 divisors (see below), whose sum is σ = 6662283264. Its totient is φ = 1147426560.

The previous prime is 2815868339. The next prime is 2815868399. The reversal of 2815868384 is 4838685182.

It is a super-2 number, since 2×2815868384² = 15858229512021542912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22172129 + ... + 22172255.

It is an arithmetic number, because the mean of its divisors is an integer number (46265856).

Almost surely, 2^2815868384 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 2815868384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3331141632).

2815868384 is an abundant number, since it is smaller than the sum of its proper divisors (3846414880).

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

2815868384 is a wasteful number, since it uses less digits than its factorization.

2815868384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 270 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 53.

The square root of 2815868384 is about 53064.7565150355. The cubic root of 2815868384 is about 1412.1173332987.

The spelling of 2815868384 in words is "two billion, eight hundred fifteen million, eight hundred sixty-eight thousand, three hundred eighty-four".