28314289 has 2 divisors, whose sum is σ = 28314290. Its totient is φ = 28314288.

The previous prime is 28314283. The next prime is 28314323. The reversal of 28314289 is 98241382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 12194064 = 4015^2 + 3492^2 .

It is a cyclic number.

It is not a de Polignac number, because 28314289 - 2³ = 28314281 is a prime.

It is not a weakly prime, because it can be changed into another prime (28314281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14157144 + 14157145.

It is an arithmetic number, because the mean of its divisors is an integer number (14157145).

Almost surely, 2^28314289 is an apocalyptic number.

It is an amenable number.

28314289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28314289 is an equidigital number, since it uses as much as digits as its factorization.

28314289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 28314289 is about 5321.1172698974. The cubic root of 28314289 is about 304.7908231600.

The spelling of 28314289 in words is "twenty-eight million, three hundred fourteen thousand, two hundred eighty-nine".