28225563 has 8 divisors (see below), whose sum is σ = 37824000. Its totient is φ = 18722088.

The previous prime is 28225543. The next prime is 28225567. The reversal of 28225563 is 36552282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28225563 - 2¹⁴ = 28209179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28225567) 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 7 ways as a sum of consecutive naturals, for example, 23043 + ... + 24236.

It is an arithmetic number, because the mean of its divisors is an integer number (4728000).

Almost surely, 2^28225563 is an apocalyptic number.

28225563 is a deficient number, since it is larger than the sum of its proper divisors (9598437).

28225563 is a wasteful number, since it uses less digits than its factorization.

28225563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47481.

The product of its digits is 28800, while the sum is 33.

The square root of 28225563 is about 5312.7735694268. The cubic root of 28225563 is about 304.4721246265.

It can be divided in two parts, 2822 and 5563, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 28225563 in words is "twenty-eight million, two hundred twenty-five thousand, five hundred sixty-three".