2188942858 has 4 divisors (see below), whose sum is σ = 3283414290. Its totient is φ = 1094471428.

The previous prime is 2188942853. The next prime is 2188942859. The reversal of 2188942858 is 8582498812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1888163209 + 300779649 = 43453^2 + 17343^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2188942799 and 2188942808.

It is not an unprimeable number, because it can be changed into a prime (2188942853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547235713 + ... + 547235716.

Almost surely, 2^2188942858 is an apocalyptic number.

2188942858 is a deficient number, since it is larger than the sum of its proper divisors (1094471432).

2188942858 is a wasteful number, since it uses less digits than its factorization.

2188942858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094471431.

The product of its digits is 2949120, while the sum is 55.

The square root of 2188942858 is about 46786.1395928324. The cubic root of 2188942858 is about 1298.4088734639.

The spelling of 2188942858 in words is "two billion, one hundred eighty-eight million, nine hundred forty-two thousand, eight hundred fifty-eight".