28051577 has 2 divisors, whose sum is σ = 28051578. Its totient is φ = 28051576.

The previous prime is 28051567. The next prime is 28051601. The reversal of 28051577 is 77515082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15808576 + 12243001 = 3976^2 + 3499^2 .

It is a cyclic number.

It is not a de Polignac number, because 28051577 - 2¹⁶ = 27986041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28051537) 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, 14025788 + 14025789.

It is an arithmetic number, because the mean of its divisors is an integer number (14025789).

Almost surely, 2^28051577 is an apocalyptic number.

It is an amenable number.

28051577 is a deficient number, since it is larger than the sum of its proper divisors (1).

28051577 is an equidigital number, since it uses as much as digits as its factorization.

28051577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 28051577 is about 5296.3739482782. The cubic root of 28051577 is about 303.8452329998.

The spelling of 28051577 in words is "twenty-eight million, fifty-one thousand, five hundred seventy-seven".