28022356 has 12 divisors (see below), whose sum is σ = 49098420. Its totient is φ = 13994240.

The previous prime is 28022353. The next prime is 28022383. The reversal of 28022356 is 65322082.

It can be written as a sum of positive squares in 2 ways, for example, as 1602756 + 26419600 = 1266^2 + 5140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022353) 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 3 ways as a sum of consecutive naturals, for example, 55 + ... + 7486.

It is an arithmetic number, because the mean of its divisors is an integer number (4091535).

Almost surely, 2^28022356 is an apocalyptic number.

It is an amenable number.

28022356 is a deficient number, since it is larger than the sum of its proper divisors (21076064).

28022356 is a wasteful number, since it uses less digits than its factorization.

28022356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8474 (or 8472 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28022356 is about 5293.6146440783. The cubic root of 28022356 is about 303.7396923348.

The spelling of 28022356 in words is "twenty-eight million, twenty-two thousand, three hundred fifty-six".