28228576 has 36 divisors (see below), whose sum is σ = 57174768. Its totient is φ = 13713152.

The previous prime is 28228573. The next prime is 28228621. The reversal of 28228576 is 67582282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228573) 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, 205980 + ... + 206116.

It is an arithmetic number, because the mean of its divisors is an integer number (1588188).

Almost surely, 2^28228576 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 28228576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28587384).

28228576 is an abundant number, since it is smaller than the sum of its proper divisors (28946192).

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

28228576 is an equidigital number, since it uses as much as digits as its factorization.

28228576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 186 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 28228576 is about 5313.0571237283. The cubic root of 28228576 is about 304.4829580906.

The spelling of 28228576 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred seventy-six".