28585747 has 4 divisors (see below), whose sum is σ = 30090280. Its totient is φ = 27081216.

The previous prime is 28585741. The next prime is 28585769. The reversal of 28585747 is 74758582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74758582 = 2 ⋅37379291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28585747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28585697 and 28585706.

It is not an unprimeable number, because it can be changed into a prime (28585741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752238 + ... + 752275.

It is an arithmetic number, because the mean of its divisors is an integer number (7522570).

Almost surely, 2^28585747 is an apocalyptic number.

28585747 is a deficient number, since it is larger than the sum of its proper divisors (1504533).

28585747 is a wasteful number, since it uses less digits than its factorization.

28585747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504532.

The product of its digits is 627200, while the sum is 46.

The square root of 28585747 is about 5346.5640368371. The cubic root of 28585747 is about 305.7617686687.

The spelling of 28585747 in words is "twenty-eight million, five hundred eighty-five thousand, seven hundred forty-seven".