2189668988 has 24 divisors (see below), whose sum is σ = 4128298608. Its totient is φ = 1010221056.

The previous prime is 2189668981. The next prime is 2189668997. The reversal of 2189668988 is 8898669812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189668981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157820 + ... + 171132.

It is an arithmetic number, because the mean of its divisors is an integer number (172012442).

Almost surely, 2^2189668988 is an apocalyptic number.

It is an amenable number.

2189668988 is a deficient number, since it is larger than the sum of its proper divisors (1938629620).

2189668988 is a wasteful number, since it uses less digits than its factorization.

2189668988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16493 (or 16491 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 65.

The square root of 2189668988 is about 46793.8990467775. The cubic root of 2189668988 is about 1298.5524297319.

The spelling of 2189668988 in words is "two billion, one hundred eighty-nine million, six hundred sixty-eight thousand, nine hundred eighty-eight".