28227564 has 36 divisors (see below), whose sum is σ = 71879080. Its totient is φ = 9339840.

The previous prime is 28227523. The next prime is 28227649. The reversal of 28227564 is 46572282.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2184 + ... + 7824.

Almost surely, 2^28227564 is an apocalyptic number.

It is an amenable number.

28227564 is an abundant number, since it is smaller than the sum of its proper divisors (43651516).

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

28227564 is a wasteful number, since it uses less digits than its factorization.

28227564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790 (or 5785 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28227564 is about 5312.9618858034. The cubic root of 28227564 is about 304.4793194558.

The spelling of 28227564 in words is "twenty-eight million, two hundred twenty-seven thousand, five hundred sixty-four".