43781028 has 12 divisors (see below), whose sum is σ = 102155760. Its totient is φ = 14593672.

The previous prime is 43781011. The next prime is 43781033. The reversal of 43781028 is 82018734.

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 43781028.

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, 1824198 + ... + 1824221.

It is an arithmetic number, because the mean of its divisors is an integer number (8512980).

Almost surely, 2^43781028 is an apocalyptic number.

It is an amenable number.

43781028 is an abundant number, since it is smaller than the sum of its proper divisors (58374732).

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

43781028 is a wasteful number, since it uses less digits than its factorization.

43781028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648426 (or 3648424 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 43781028 is about 6616.7233582794. The cubic root of 43781028 is about 352.4482173318.

The spelling of 43781028 in words is "forty-three million, seven hundred eighty-one thousand, twenty-eight".