65028609 has 16 divisors (see below), whose sum is σ = 96465600. Its totient is φ = 43295328.

The previous prime is 65028577. The next prime is 65028611. The reversal of 65028609 is 90682056.

It is not a de Polignac number, because 65028609 - 2⁵ = 65028577 is a prime.

It is a super-3 number, since 3×65028609³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65028629) 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, 33037 + ... + 34949.

It is an arithmetic number, because the mean of its divisors is an integer number (6029100).

Almost surely, 2^65028609 is an apocalyptic number.

It is an amenable number.

65028609 is a deficient number, since it is larger than the sum of its proper divisors (31436991).

65028609 is a wasteful number, since it uses less digits than its factorization.

65028609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181 (or 3175 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 65028609 is about 8064.0318079730. The cubic root of 65028609 is about 402.1315564082.

The spelling of 65028609 in words is "sixty-five million, twenty-eight thousand, six hundred nine".