28722252 has 24 divisors (see below), whose sum is σ = 72174256. Its totient is φ = 8837568.

The previous prime is 28722251. The next prime is 28722289. The reversal of 28722252 is 25222782.

It is not an unprimeable number, because it can be changed into a prime (28722251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91903 + ... + 92214.

Almost surely, 2^28722252 is an apocalyptic number.

It is an amenable number.

28722252 is an abundant number, since it is smaller than the sum of its proper divisors (43452004).

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

28722252 is a wasteful number, since it uses less digits than its factorization.

28722252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184137 (or 184135 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 28722252 is about 5359.3145084050. The cubic root of 28722252 is about 306.2476955539.

The spelling of 28722252 in words is "twenty-eight million, seven hundred twenty-two thousand, two hundred fifty-two".