43728565 has 16 divisors (see below), whose sum is σ = 53851392. Its totient is φ = 34072384.

The previous prime is 43728563. The next prime is 43728571. The reversal of 43728565 is 56582734.

It is a cyclic number.

It is not a de Polignac number, because 43728565 - 2¹ = 43728563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43728563) 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, 74202 + ... + 74788.

It is an arithmetic number, because the mean of its divisors is an integer number (3365712).

Almost surely, 2^43728565 is an apocalyptic number.

It is an amenable number.

43728565 is a deficient number, since it is larger than the sum of its proper divisors (10122827).

43728565 is a wasteful number, since it uses less digits than its factorization.

43728565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its digits is 201600, while the sum is 40.

The square root of 43728565 is about 6612.7577454493. The cubic root of 43728565 is about 352.3073809746.

The spelling of 43728565 in words is "forty-three million, seven hundred twenty-eight thousand, five hundred sixty-five".