2169128 has 16 divisors (see below), whose sum is σ = 4380180. Its totient is φ = 1001088.

The previous prime is 2169109. The next prime is 2169133. The reversal of 2169128 is 8219612.

It can be written as a sum of positive squares in 2 ways, for example, as 2137444 + 31684 = 1462^2 + 178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2169128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10325 + ... + 10532.

2^2169128 is an apocalyptic number.

It is an amenable number.

2169128 is an abundant number, since it is smaller than the sum of its proper divisors (2211052).

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

2169128 is a wasteful number, since it uses less digits than its factorization.

2169128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20876 (or 20872 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 2169128 is about 1472.7959804399. The cubic root of 2169128 is about 129.4479151316.

The spelling of 2169128 in words is "two million, one hundred sixty-nine thousand, one hundred twenty-eight".