2118782888 has 16 divisors (see below), whose sum is σ = 3977260980. Its totient is φ = 1058179968.

The previous prime is 2118782881. The next prime is 2118782899. The reversal of 2118782888 is 8882878112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2046838564 + 71944324 = 45242^2 + 8482^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2118782881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143981 + ... + 158012.

Almost surely, 2^2118782888 is an apocalyptic number.

It is an amenable number.

2118782888 is a deficient number, since it is larger than the sum of its proper divisors (1858478092).

2118782888 is a wasteful number, since it uses less digits than its factorization.

2118782888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302876 (or 302872 counting only the distinct ones).

The product of its digits is 917504, while the sum is 53.

The square root of 2118782888 is about 46030.2388436124. The cubic root of 2118782888 is about 1284.3857709332.

The spelling of 2118782888 in words is "two billion, one hundred eighteen million, seven hundred eighty-two thousand, eight hundred eighty-eight".