43749728 has 36 divisors (see below), whose sum is σ = 94682700. Its totient is φ = 19884480.

The previous prime is 43749709. The next prime is 43749743. The reversal of 43749728 is 82794734.

It is a Harshad number since it is a multiple of its sum of digits (44).

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 5 ways as a sum of consecutive naturals, for example, 1778 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (2630075).

Almost surely, 2^43749728 is an apocalyptic number.

It is an amenable number.

43749728 is an abundant number, since it is smaller than the sum of its proper divisors (50932972).

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

43749728 is a wasteful number, since it uses less digits than its factorization.

43749728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331 (or 11312 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 43749728 is about 6614.3577163622. The cubic root of 43749728 is about 352.3642063673.

The spelling of 43749728 in words is "forty-three million, seven hundred forty-nine thousand, seven hundred twenty-eight".