128001844 has 6 divisors (see below), whose sum is σ = 224003234. Its totient is φ = 64000920.

The previous prime is 128001827. The next prime is 128001869. The reversal of 128001844 is 448100821.

It can be written as a sum of positive squares in only one way, i.e., 104284944 + 23716900 = 10212^2 + 4870^2 .

It is a congruent number.

It is an unprimeable number.

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, 16000227 + ... + 16000234.

Almost surely, 2^128001844 is an apocalyptic number.

It is an amenable number.

128001844 is a deficient number, since it is larger than the sum of its proper divisors (96001390).

128001844 is a wasteful number, since it uses less digits than its factorization.

128001844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32000465 (or 32000463 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 128001844 is about 11313.7899927478. The cubic root of 128001844 is about 503.9708400447.

The spelling of 128001844 in words is "one hundred twenty-eight million, one thousand, eight hundred forty-four".