28563424 has 36 divisors (see below), whose sum is σ = 58978584. Its totient is φ = 13591424.

The previous prime is 28563419. The next prime is 28563427. The reversal of 28563424 is 42436582.

It is a self number, because there is not a number n which added to its sum of digits gives 28563424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28563427) 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, 144894 + ... + 145090.

It is an arithmetic number, because the mean of its divisors is an integer number (1638294).

Almost surely, 2^28563424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28563424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29489292).

28563424 is an abundant number, since it is smaller than the sum of its proper divisors (30415160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28563424 is an equidigital number, since it uses as much as digits as its factorization.

28563424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 222 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 28563424 is about 5344.4760267027. The cubic root of 28563424 is about 305.6821567623.

The spelling of 28563424 in words is "twenty-eight million, five hundred sixty-three thousand, four hundred twenty-four".