28073563 has 4 divisors (see below), whose sum is σ = 32084080. Its totient is φ = 24063048.

The previous prime is 28073533. The next prime is 28073567. The reversal of 28073563 is 36537082.

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 28073563 - 2¹⁷ = 27942491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28073567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005248 + ... + 2005261.

It is an arithmetic number, because the mean of its divisors is an integer number (8021020).

Almost surely, 2^28073563 is an apocalyptic number.

28073563 is a deficient number, since it is larger than the sum of its proper divisors (4010517).

28073563 is an equidigital number, since it uses as much as digits as its factorization.

28073563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010516.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 28073563 is about 5298.4491127121. The cubic root of 28073563 is about 303.9245939185.

The spelling of 28073563 in words is "twenty-eight million, seventy-three thousand, five hundred sixty-three".