28736653 has 12 divisors (see below), whose sum is σ = 32189724. Its totient is φ = 25625600.

The previous prime is 28736641. The next prime is 28736657. The reversal of 28736653 is 35663782.

It can be written as a sum of positive squares in 2 ways, for example, as 21650409 + 7086244 = 4653^2 + 2662^2 .

It is not a de Polignac number, because 28736653 - 2¹⁷ = 28605581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28736657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4173 + ... + 8653.

It is an arithmetic number, because the mean of its divisors is an integer number (2682477).

Almost surely, 2^28736653 is an apocalyptic number.

It is an amenable number.

28736653 is a deficient number, since it is larger than the sum of its proper divisors (3453071).

28736653 is a wasteful number, since it uses less digits than its factorization.

28736653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556 (or 4545 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 28736653 is about 5360.6578887297. The cubic root of 28736653 is about 306.2988700020.

The spelling of 28736653 in words is "twenty-eight million, seven hundred thirty-six thousand, six hundred fifty-three".