28065653 has 16 divisors (see below), whose sum is σ = 35477376. Its totient is φ = 21565440.

The previous prime is 28065637. The next prime is 28065659. The reversal of 28065653 is 35656082.

It is a cyclic number.

It is not a de Polignac number, because 28065653 - 2⁴ = 28065637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065659) 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, 3125 + ... + 8117.

It is an arithmetic number, because the mean of its divisors is an integer number (2217336).

Almost surely, 2^28065653 is an apocalyptic number.

It is an amenable number.

28065653 is a deficient number, since it is larger than the sum of its proper divisors (7411723).

28065653 is a wasteful number, since it uses less digits than its factorization.

28065653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 28065653 is about 5297.7026152852. The cubic root of 28065653 is about 303.8960466650.

The spelling of 28065653 in words is "twenty-eight million, sixty-five thousand, six hundred fifty-three".