28600861 has 2 divisors, whose sum is σ = 28600862. Its totient is φ = 28600860.

The previous prime is 28600849. The next prime is 28600883. The reversal of 28600861 is 16800682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27562500 + 1038361 = 5250^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 28600861 - 2¹⁷ = 28469789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28600811) 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 as a sum of consecutive naturals, namely, 14300430 + 14300431.

It is an arithmetic number, because the mean of its divisors is an integer number (14300431).

Almost surely, 2^28600861 is an apocalyptic number.

It is an amenable number.

28600861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28600861 is an equidigital number, since it uses as much as digits as its factorization.

28600861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 28600861 is about 5347.9772811784. The cubic root of 28600861 is about 305.8156471412.

The spelling of 28600861 in words is "twenty-eight million, six hundred thousand, eight hundred sixty-one".