28255361 has 2 divisors, whose sum is σ = 28255362. Its totient is φ = 28255360.

The previous prime is 28255313. The next prime is 28255363. The reversal of 28255361 is 16355282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16483600 + 11771761 = 4060^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 28255361 - 2¹⁰ = 28254337 is a prime.

Together with 28255363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28255363) 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 as a sum of consecutive naturals, namely, 14127680 + 14127681.

It is an arithmetic number, because the mean of its divisors is an integer number (14127681).

Almost surely, 2^28255361 is an apocalyptic number.

It is an amenable number.

28255361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28255361 is an equidigital number, since it uses as much as digits as its factorization.

28255361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 28255361 is about 5315.5772029009. The cubic root of 28255361 is about 304.5792316668.

The spelling of 28255361 in words is "twenty-eight million, two hundred fifty-five thousand, three hundred sixty-one".