28222384 has 30 divisors (see below), whose sum is σ = 55607676. Its totient is φ = 13875840.

The previous prime is 28222367. The next prime is 28222387. The reversal of 28222384 is 48322282.

It is not an unprimeable number, because it can be changed into a prime (28222387) by changing a digit.

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, 85099 + ... + 85429.

Almost surely, 2^28222384 is an apocalyptic number.

It is an amenable number.

28222384 is a deficient number, since it is larger than the sum of its proper divisors (27385292).

28222384 is an equidigital number, since it uses as much as digits as its factorization.

28222384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 406 counting only the distinct ones).

The product of its digits is 12288, while the sum is 31.

The square root of 28222384 is about 5312.4743764088. The cubic root of 28222384 is about 304.4606934612.

The spelling of 28222384 in words is "twenty-eight million, two hundred twenty-two thousand, three hundred eighty-four".