2187868368 has 80 divisors (see below), whose sum is σ = 6526110080. Its totient is φ = 618651648.

The previous prime is 2187868343. The next prime is 2187868421. The reversal of 2187868368 is 8638687812.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973 + ... + 66156.

It is an arithmetic number, because the mean of its divisors is an integer number (81576376).

Almost surely, 2^2187868368 is an apocalyptic number.

2187868368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2187868368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3263055040).

2187868368 is an abundant number, since it is smaller than the sum of its proper divisors (4338241712).

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

2187868368 is a wasteful number, since it uses less digits than its factorization.

2187868368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67244 (or 67238 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The square root of 2187868368 is about 46774.6551884672. The cubic root of 2187868368 is about 1298.1963879889.

The spelling of 2187868368 in words is "two billion, one hundred eighty-seven million, eight hundred sixty-eight thousand, three hundred sixty-eight".