28446563 has 4 divisors (see below), whose sum is σ = 28611168. Its totient is φ = 28281960.

The previous prime is 28446541. The next prime is 28446569. The reversal of 28446563 is 36564482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28446563 - 2²⁰ = 27397987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28446569) 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, 82043 + ... + 82388.

It is an arithmetic number, because the mean of its divisors is an integer number (7152792).

Almost surely, 2^28446563 is an apocalyptic number.

28446563 is a deficient number, since it is larger than the sum of its proper divisors (164605).

28446563 is a wasteful number, since it uses less digits than its factorization.

28446563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164604.

The product of its digits is 138240, while the sum is 38.

The square root of 28446563 is about 5333.5319442186. The cubic root of 28446563 is about 305.2647097242.

The spelling of 28446563 in words is "twenty-eight million, four hundred forty-six thousand, five hundred sixty-three".