28850561 has 2 divisors, whose sum is σ = 28850562. Its totient is φ = 28850560.

The previous prime is 28850543. The next prime is 28850597. The reversal of 28850561 is 16505882.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15484225 + 13366336 = 3935^2 + 3656^2 .

It is a cyclic number.

It is not a de Polignac number, because 28850561 - 2¹⁰ = 28849537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28850501) 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, 14425280 + 14425281.

It is an arithmetic number, because the mean of its divisors is an integer number (14425281).

Almost surely, 2^28850561 is an apocalyptic number.

It is an amenable number.

28850561 is a deficient number, since it is larger than the sum of its proper divisors (1).

28850561 is an equidigital number, since it uses as much as digits as its factorization.

28850561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 28850561 is about 5371.2718233208. The cubic root of 28850561 is about 306.7030448076.

The spelling of 28850561 in words is "twenty-eight million, eight hundred fifty thousand, five hundred sixty-one".