43945728 has 36 divisors (see below), whose sum is σ = 116961768. Its totient is φ = 14648320.

The previous prime is 43945717. The next prime is 43945763. The reversal of 43945728 is 82754934.

It is a self number, because there is not a number n which added to its sum of digits gives 43945728.

It is a congruent number.

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, 27843 + ... + 29378.

It is an arithmetic number, because the mean of its divisors is an integer number (3248938).

Almost surely, 2^43945728 is an apocalyptic number.

43945728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

43945728 is an abundant number, since it is smaller than the sum of its proper divisors (73016040).

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

43945728 is an equidigital number, since it uses as much as digits as its factorization.

43945728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57240 (or 57226 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 43945728 is about 6629.1574125223. The cubic root of 43945728 is about 352.8896230060.

The spelling of 43945728 in words is "forty-three million, nine hundred forty-five thousand, seven hundred twenty-eight".