28325824 has 28 divisors (see below), whose sum is σ = 56767984. Its totient is φ = 14022144.

The previous prime is 28325821. The next prime is 28325849. The reversal of 28325824 is 42852382.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28325824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28325821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4444 + ... + 8740.

It is an arithmetic number, because the mean of its divisors is an integer number (2027428).

Almost surely, 2^28325824 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 28325824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28383992).

28325824 is an abundant number, since it is smaller than the sum of its proper divisors (28442160).

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

28325824 is a wasteful number, since it uses less digits than its factorization.

28325824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4412 (or 4402 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 28325824 is about 5322.2010484385. The cubic root of 28325824 is about 304.8322072685.

The spelling of 28325824 in words is "twenty-eight million, three hundred twenty-five thousand, eight hundred twenty-four".