28584645 has 16 divisors (see below), whose sum is σ = 48143040. Its totient is φ = 14442624.

The previous prime is 28584643. The next prime is 28584659. The reversal of 28584645 is 54648582.

It is not a de Polignac number, because 28584645 - 2¹ = 28584643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28584597 and 28584606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28584641) 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, 49864 + ... + 50433.

It is an arithmetic number, because the mean of its divisors is an integer number (3008940).

Almost surely, 2^28584645 is an apocalyptic number.

It is an amenable number.

28584645 is a deficient number, since it is larger than the sum of its proper divisors (19558395).

28584645 is a wasteful number, since it uses less digits than its factorization.

28584645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100324.

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

The square root of 28584645 is about 5346.4609790028. The cubic root of 28584645 is about 305.7578395102.

It can be divided in two parts, 2858 and 4645, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 28584645 in words is "twenty-eight million, five hundred eighty-four thousand, six hundred forty-five".