28246861 has 2 divisors, whose sum is σ = 28246862. Its totient is φ = 28246860.

The previous prime is 28246849. The next prime is 28246891. The reversal of 28246861 is 16864282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26071236 + 2175625 = 5106^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 28246861 - 2⁹ = 28246349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28246861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28246811) 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, 14123430 + 14123431.

It is an arithmetic number, because the mean of its divisors is an integer number (14123431).

Almost surely, 2^28246861 is an apocalyptic number.

It is an amenable number.

28246861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28246861 is an equidigital number, since it uses as much as digits as its factorization.

28246861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 37.

The square root of 28246861 is about 5314.7776058834. Note that the first 3 decimals coincide. The cubic root of 28246861 is about 304.5486866301.

The spelling of 28246861 in words is "twenty-eight million, two hundred forty-six thousand, eight hundred sixty-one".