65728859 has 8 divisors (see below), whose sum is σ = 75279360. Its totient is φ = 56218536.

The previous prime is 65728841. The next prime is 65728907. The reversal of 65728859 is 95882756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65728859 - 2⁸ = 65728603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65728259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6449 + ... + 13154.

It is an arithmetic number, because the mean of its divisors is an integer number (9409920).

Almost surely, 2^65728859 is an apocalyptic number.

65728859 is a deficient number, since it is larger than the sum of its proper divisors (9550501).

65728859 is a wasteful number, since it uses less digits than its factorization.

65728859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20089.

The product of its digits is 1209600, while the sum is 50.

The square root of 65728859 is about 8107.3336554011. Note that the first 3 decimals coincide. The cubic root of 65728859 is about 403.5698354926.

The spelling of 65728859 in words is "sixty-five million, seven hundred twenty-eight thousand, eight hundred fifty-nine".