43728385 has 4 divisors (see below), whose sum is σ = 52474068. Its totient is φ = 34982704.

The previous prime is 43728361. The next prime is 43728407. The reversal of 43728385 is 58382734.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9048064 + 34680321 = 3008^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 43728385 - 2⁷ = 43728257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4372834 + ... + 4372843.

It is an arithmetic number, because the mean of its divisors is an integer number (13118517).

Almost surely, 2^43728385 is an apocalyptic number.

It is an amenable number.

43728385 is a deficient number, since it is larger than the sum of its proper divisors (8745683).

43728385 is an equidigital number, since it uses as much as digits as its factorization.

43728385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745682.

The product of its digits is 161280, while the sum is 40.

The square root of 43728385 is about 6612.7441353798. The cubic root of 43728385 is about 352.3068975727.

The spelling of 43728385 in words is "forty-three million, seven hundred twenty-eight thousand, three hundred eighty-five".