43644428 has 6 divisors (see below), whose sum is σ = 76377756. Its totient is φ = 21822212.

The previous prime is 43644421. The next prime is 43644431. The reversal of 43644428 is 82444634.

43644428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (43644421) 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, 5455550 + ... + 5455557.

It is an arithmetic number, because the mean of its divisors is an integer number (12729626).

Almost surely, 2^43644428 is an apocalyptic number.

It is an amenable number.

43644428 is a deficient number, since it is larger than the sum of its proper divisors (32733328).

43644428 is a wasteful number, since it uses less digits than its factorization.

43644428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10911111 (or 10911109 counting only the distinct ones).

The product of its digits is 73728, while the sum is 35.

The square root of 43644428 is about 6606.3929643944. The cubic root of 43644428 is about 352.0812807306.

The spelling of 43644428 in words is "forty-three million, six hundred forty-four thousand, four hundred twenty-eight".