2186728829 has 4 divisors (see below), whose sum is σ = 2301819840. Its totient is φ = 2071637820.

The previous prime is 2186728811. The next prime is 2186728877. The reversal of 2186728829 is 9288276812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2186728829 - 2⁸ = 2186728573 is a prime.

It is a super-2 number, since 2×2186728829² = 9563565943159422482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186728889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57545477 + ... + 57545514.

It is an arithmetic number, because the mean of its divisors is an integer number (575454960).

Almost surely, 2^2186728829 is an apocalyptic number.

It is an amenable number.

2186728829 is a deficient number, since it is larger than the sum of its proper divisors (115091011).

2186728829 is a wasteful number, since it uses less digits than its factorization.

2186728829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115091010.

The product of its digits is 1548288, while the sum is 53.

The square root of 2186728829 is about 46762.4724431889. The cubic root of 2186728829 is about 1297.9709627384.

The spelling of 2186728829 in words is "two billion, one hundred eighty-six million, seven hundred twenty-eight thousand, eight hundred twenty-nine".