65728843 has 4 divisors (see below), whose sum is σ = 65819248. Its totient is φ = 65638440.

The previous prime is 65728841. The next prime is 65728907. The reversal of 65728843 is 34882756.

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

It is a cyclic number.

It is not a de Polignac number, because 65728843 - 2¹ = 65728841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65728843.

It is not an unprimeable number, because it can be changed into a prime (65728841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44103 + ... + 45568.

It is an arithmetic number, because the mean of its divisors is an integer number (16454812).

Almost surely, 2^65728843 is an apocalyptic number.

65728843 is a deficient number, since it is larger than the sum of its proper divisors (90405).

65728843 is an equidigital number, since it uses as much as digits as its factorization.

65728843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90404.

The product of its digits is 322560, while the sum is 43.

The square root of 65728843 is about 8107.3326686402. The cubic root of 65728843 is about 403.5698027464.

The spelling of 65728843 in words is "sixty-five million, seven hundred twenty-eight thousand, eight hundred forty-three".