28048257 has 12 divisors (see below), whose sum is σ = 41609620. Its totient is φ = 18193248.

The previous prime is 28048253. The next prime is 28048301. The reversal of 28048257 is 75284082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13024881 + 15023376 = 3609^2 + 3876^2 .

It is not a de Polignac number, because 28048257 - 2² = 28048253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28048253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41782 + ... + 42447.

Almost surely, 2^28048257 is an apocalyptic number.

It is an amenable number.

28048257 is a deficient number, since it is larger than the sum of its proper divisors (13561363).

28048257 is a wasteful number, since it uses less digits than its factorization.

28048257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84272 (or 84269 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28048257 is about 5296.0605170258. The cubic root of 28048257 is about 303.8332454863.

The spelling of 28048257 in words is "twenty-eight million, forty-eight thousand, two hundred fifty-seven".