28223716 has 12 divisors (see below), whose sum is σ = 49453740. Its totient is φ = 14094080.

The previous prime is 28223687. The next prime is 28223717. The reversal of 28223716 is 61732282.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 16974400 = 3354^2 + 4120^2 .

It is not an unprimeable number, because it can be changed into a prime (28223717) 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, 481 + ... + 7528.

It is an arithmetic number, because the mean of its divisors is an integer number (4121145).

Almost surely, 2^28223716 is an apocalyptic number.

It is an amenable number.

28223716 is a deficient number, since it is larger than the sum of its proper divisors (21230024).

28223716 is a wasteful number, since it uses less digits than its factorization.

28223716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8894 (or 8892 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 28223716 is about 5312.5997402402. The cubic root of 28223716 is about 304.4654832204.

Adding to 28223716 its reverse (61732282), we get a palindrome (89955998).

The spelling of 28223716 in words is "twenty-eight million, two hundred twenty-three thousand, seven hundred sixteen".