28752563 has 6 divisors (see below), whose sum is σ = 33446916. Its totient is φ = 24645012.

The previous prime is 28752551. The next prime is 28752569. The reversal of 28752563 is 36525782.

It is not a de Polignac number, because 28752563 - 2⁴ = 28752547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28752569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293345 + ... + 293442.

It is an arithmetic number, because the mean of its divisors is an integer number (5574486).

Almost surely, 2^28752563 is an apocalyptic number.

28752563 is a deficient number, since it is larger than the sum of its proper divisors (4694353).

28752563 is an equidigital number, since it uses as much as digits as its factorization.

28752563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586801 (or 586794 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 28752563 is about 5362.1416430378. The cubic root of 28752563 is about 306.3553868593.

The spelling of 28752563 in words is "twenty-eight million, seven hundred fifty-two thousand, five hundred sixty-three".