28272535 has 16 divisors (see below), whose sum is σ = 35591040. Its totient is φ = 21530880.

The previous prime is 28272533. The next prime is 28272557. The reversal of 28272535 is 53527282.

It is not a de Polignac number, because 28272535 - 2¹ = 28272533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28272535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272533) 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 15 ways as a sum of consecutive naturals, for example, 9250 + ... + 11920.

It is an arithmetic number, because the mean of its divisors is an integer number (2224440).

Almost surely, 2^28272535 is an apocalyptic number.

28272535 is a deficient number, since it is larger than the sum of its proper divisors (7318505).

28272535 is a wasteful number, since it uses less digits than its factorization.

28272535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778.

The product of its digits is 33600, while the sum is 34.

The square root of 28272535 is about 5317.1923982493. The cubic root of 28272535 is about 304.6409283278.

The spelling of 28272535 in words is "twenty-eight million, two hundred seventy-two thousand, five hundred thirty-five".