43280728 has 16 divisors (see below), whose sum is σ = 81512280. Its totient is φ = 21544128.

The previous prime is 43280723. The next prime is 43280737. The reversal of 43280728 is 82708234.

It is a junction number, because it is equal to n+sod(n) for n = 43280693 and 43280702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43280723) by changing a digit.

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, 10101 + ... + 13732.

Almost surely, 2^43280728 is an apocalyptic number.

It is an amenable number.

43280728 is a deficient number, since it is larger than the sum of its proper divisors (38231552).

43280728 is a wasteful number, since it uses less digits than its factorization.

43280728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24066 (or 24062 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 43280728 is about 6578.8090107557. The cubic root of 43280728 is about 351.1005574934.

The spelling of 43280728 in words is "forty-three million, two hundred eighty thousand, seven hundred twenty-eight".