28017563 has 12 divisors (see below), whose sum is σ = 32989320. Its totient is φ = 23725716.

The previous prime is 28017541. The next prime is 28017589. The reversal of 28017563 is 36571082.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 28017563 - 2⁸ = 28017307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28017163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337520 + ... + 337602.

It is an arithmetic number, because the mean of its divisors is an integer number (2749110).

Almost surely, 2^28017563 is an apocalyptic number.

28017563 is a deficient number, since it is larger than the sum of its proper divisors (4971757).

28017563 is an frugal number, since it uses more digits than its factorization.

28017563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28017563 is about 5293.1619094828. The cubic root of 28017563 is about 303.7223739319.

The spelling of 28017563 in words is "twenty-eight million, seventeen thousand, five hundred sixty-three".