2186728 has 16 divisors (see below), whose sum is σ = 4168260. Its totient is φ = 1075200.

The previous prime is 2186719. The next prime is 2186731. The reversal of 2186728 is 8276812.

2186728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2137444 + 49284 = 1462^2 + 222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2186693 and 2186702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753 + ... + 2728.

2^2186728 is an apocalyptic number.

It is an amenable number.

2186728 is a deficient number, since it is larger than the sum of its proper divisors (1981532).

2186728 is a wasteful number, since it uses less digits than its factorization.

2186728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548 (or 4544 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 2186728 is about 1478.7589391108. The cubic root of 2186728 is about 129.7970798716.

The spelling of 2186728 in words is "two million, one hundred eighty-six thousand, seven hundred twenty-eight".