28647135 has 64 divisors (see below), whose sum is σ = 56401920. Its totient is φ = 13680000.

The previous prime is 28647133. The next prime is 28647161. The reversal of 28647135 is 53174682.

28647135 is a `hidden beast` number, since 2 + 8 + 647 + 1 + 3 + 5 = 666.

It is not a de Polignac number, because 28647135 - 2¹ = 28647133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28647135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647133) 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 63 ways as a sum of consecutive naturals, for example, 149890 + ... + 150080.

It is an arithmetic number, because the mean of its divisors is an integer number (881280).

Almost surely, 2^28647135 is an apocalyptic number.

28647135 is a deficient number, since it is larger than the sum of its proper divisors (27754785).

28647135 is a wasteful number, since it uses less digits than its factorization.

28647135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 311 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28647135 is about 5352.3018412642. The cubic root of 28647135 is about 305.9804870295.

It can be divided in two parts, 28647 and 135, that added together give a palindrome (28782).

The spelling of 28647135 in words is "twenty-eight million, six hundred forty-seven thousand, one hundred thirty-five".