2188217268 has 30 divisors (see below), whose sum is σ = 5720433026. Its totient is φ = 729405648.

The previous prime is 2188217261. The next prime is 2188217281. The reversal of 2188217268 is 8627128812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1833723684 + 354493584 = 42822^2 + 18828^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188217261) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3376555 + ... + 3377202.

Almost surely, 2^2188217268 is an apocalyptic number.

It is an amenable number.

2188217268 is an abundant number, since it is smaller than the sum of its proper divisors (3532215758).

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

2188217268 is a wasteful number, since it uses less digits than its factorization.

2188217268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753773 (or 6753762 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 2188217268 is about 46778.3846236699. The cubic root of 2188217268 is about 1298.2653922385.

The spelling of 2188217268 in words is "two billion, one hundred eighty-eight million, two hundred seventeen thousand, two hundred sixty-eight".