43940073 has 16 divisors (see below), whose sum is σ = 59984640. Its totient is φ = 28601424.

The previous prime is 43940063. The next prime is 43940077. The reversal of 43940073 is 37004934.

It is not a de Polignac number, because 43940073 - 2⁶ = 43940009 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43940073.

It is not an unprimeable number, because it can be changed into a prime (43940077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28090 + ... + 29612.

It is an arithmetic number, because the mean of its divisors is an integer number (3749040).

Almost surely, 2^43940073 is an apocalyptic number.

It is an amenable number.

43940073 is a deficient number, since it is larger than the sum of its proper divisors (16044567).

43940073 is a wasteful number, since it uses less digits than its factorization.

43940073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 43940073 is about 6628.7308740060. The cubic root of 43940073 is about 352.8744855739.

The spelling of 43940073 in words is "forty-three million, nine hundred forty thousand, seventy-three".