28868249 has 2 divisors, whose sum is σ = 28868250. Its totient is φ = 28868248.

The previous prime is 28868237. The next prime is 28868269. The reversal of 28868249 is 94286882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27931225 + 937024 = 5285^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 28868249 - 2¹² = 28864153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28868219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434124 + 14434125.

It is an arithmetic number, because the mean of its divisors is an integer number (14434125).

Almost surely, 2^28868249 is an apocalyptic number.

It is an amenable number.

28868249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28868249 is an equidigital number, since it uses as much as digits as its factorization.

28868249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 47.

The square root of 28868249 is about 5372.9181084398. The cubic root of 28868249 is about 306.7657108931.

The spelling of 28868249 in words is "twenty-eight million, eight hundred sixty-eight thousand, two hundred forty-nine".