28684545 has 16 divisors (see below), whose sum is σ = 46052160. Its totient is φ = 15246144.

The previous prime is 28684529. The next prime is 28684553. The reversal of 28684545 is 54548682.

It is not a de Polignac number, because 28684545 - 2⁴ = 28684529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28684497 and 28684506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1491 + ... + 7719.

It is an arithmetic number, because the mean of its divisors is an integer number (2878260).

Almost surely, 2^28684545 is an apocalyptic number.

It is an amenable number.

28684545 is a deficient number, since it is larger than the sum of its proper divisors (17367615).

28684545 is a wasteful number, since it uses less digits than its factorization.

28684545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544.

The product of its digits is 307200, while the sum is 42.

The square root of 28684545 is about 5355.7954591265. The cubic root of 28684545 is about 306.1136213541.

The spelling of 28684545 in words is "twenty-eight million, six hundred eighty-four thousand, five hundred forty-five".