2188868500 has 192 divisors, whose sum is σ = 5973327360. Its totient is φ = 682214400.

The previous prime is 2188868497. The next prime is 2188868509. The reversal of 2188868500 is 58688812.

It is a super-2 number, since 2×2188868500² = 9582290620584500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188868509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3321171 + ... + 3321829.

It is an arithmetic number, because the mean of its divisors is an integer number (31111080).

Almost surely, 2^2188868500 is an apocalyptic number.

2188868500 is a gapful number since it is divisible by the number (20) 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 2188868500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2986663680).

2188868500 is an abundant number, since it is smaller than the sum of its proper divisors (3784458860).

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

2188868500 is a wasteful number, since it uses less digits than its factorization.

2188868500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 46.

The square root of 2188868500 is about 46785.3449276587. The cubic root of 2188868500 is about 1298.3941710578.

The spelling of 2188868500 in words is "two billion, one hundred eighty-eight million, eight hundred sixty-eight thousand, five hundred".