43993428 has 12 divisors (see below), whose sum is σ = 102651360. Its totient is φ = 14664472.

The previous prime is 43993427. The next prime is 43993459. The reversal of 43993428 is 82439934.

It is a happy number.

43993428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 43993428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43993423) 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 in 3 ways as a sum of consecutive naturals, for example, 1833048 + ... + 1833071.

It is an arithmetic number, because the mean of its divisors is an integer number (8554280).

Almost surely, 2^43993428 is an apocalyptic number.

It is an amenable number.

43993428 is an abundant number, since it is smaller than the sum of its proper divisors (58657932).

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

43993428 is a wasteful number, since it uses less digits than its factorization.

43993428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666126 (or 3666124 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 43993428 is about 6632.7541790722. The cubic root of 43993428 is about 353.0172558019.

The spelling of 43993428 in words is "forty-three million, nine hundred ninety-three thousand, four hundred twenty-eight".