2117898188 has 36 divisors (see below), whose sum is σ = 4460117760. Its totient is φ = 876369312.

The previous prime is 2117898151. The next prime is 2117898203. The reversal of 2117898188 is 8818987112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180620 + ... + 191987.

It is an arithmetic number, because the mean of its divisors is an integer number (123892160).

Almost surely, 2^2117898188 is an apocalyptic number.

2117898188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2117898188 is an abundant number, since it is smaller than the sum of its proper divisors (2342219572).

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

2117898188 is a wasteful number, since it uses less digits than its factorization.

2117898188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372654 (or 372645 counting only the distinct ones).

The product of its digits is 516096, while the sum is 53.

The square root of 2117898188 is about 46020.6278531704. The cubic root of 2117898188 is about 1284.2069805077.

The spelling of 2117898188 in words is "two billion, one hundred seventeen million, eight hundred ninety-eight thousand, one hundred eighty-eight".