28222648 has 24 divisors (see below), whose sum is σ = 54694440. Its totient is φ = 13652400.

The previous prime is 28222631. The next prime is 28222681. The reversal of 28222648 is 84622282.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5853 + ... + 9523.

It is an arithmetic number, because the mean of its divisors is an integer number (2278935).

Almost surely, 2^28222648 is an apocalyptic number.

It is an amenable number.

28222648 is a deficient number, since it is larger than the sum of its proper divisors (26471792).

28222648 is a wasteful number, since it uses less digits than its factorization.

28222648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739 (or 3704 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 28222648 is about 5312.4992235294. The cubic root of 28222648 is about 304.4616427948.

The spelling of 28222648 in words is "twenty-eight million, two hundred twenty-two thousand, six hundred forty-eight".