43020728 has 8 divisors (see below), whose sum is σ = 80663880. Its totient is φ = 21510360.

The previous prime is 43020721. The next prime is 43020739. The reversal of 43020728 is 82702034.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 43020697 and 43020706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43020721) 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 as a sum of consecutive naturals, namely, 2688788 + ... + 2688803.

It is an arithmetic number, because the mean of its divisors is an integer number (10082985).

Almost surely, 2^43020728 is an apocalyptic number.

It is an amenable number.

43020728 is a deficient number, since it is larger than the sum of its proper divisors (37643152).

43020728 is a wasteful number, since it uses less digits than its factorization.

43020728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377597 (or 5377593 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 43020728 is about 6559.0188290628. The cubic root of 43020728 is about 350.3960903562.

The spelling of 43020728 in words is "forty-three million, twenty thousand, seven hundred twenty-eight".