28712241 has 6 divisors (see below), whose sum is σ = 41473250. Its totient is φ = 19141488.

The previous prime is 28712239. The next prime is 28712251. The reversal of 28712241 is 14221782.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 992016 = 5265^2 + 996^2 .

It is not a de Polignac number, because 28712241 - 2¹ = 28712239 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28712251) 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, 1595116 + ... + 1595133.

Almost surely, 2^28712241 is an apocalyptic number.

It is an amenable number.

28712241 is a deficient number, since it is larger than the sum of its proper divisors (12761009).

28712241 is a wasteful number, since it uses less digits than its factorization.

28712241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190255 (or 3190252 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 28712241 is about 5358.3804456197. The cubic root of 28712241 is about 306.2121110422.

The spelling of 28712241 in words is "twenty-eight million, seven hundred twelve thousand, two hundred forty-one".