28836289 has 2 divisors, whose sum is σ = 28836290. Its totient is φ = 28836288.

The previous prime is 28836271. The next prime is 28836299. The reversal of 28836289 is 98263882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 4875264 = 4895^2 + 2208^2 .

It is a cyclic number.

It is not a de Polignac number, because 28836289 - 2¹³ = 28828097 is a prime.

It is not a weakly prime, because it can be changed into another prime (28836229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14418144 + 14418145.

It is an arithmetic number, because the mean of its divisors is an integer number (14418145).

Almost surely, 2^28836289 is an apocalyptic number.

It is an amenable number.

28836289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28836289 is an equidigital number, since it uses as much as digits as its factorization.

28836289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 28836289 is about 5369.9431095683. The cubic root of 28836289 is about 306.6524624538.

The spelling of 28836289 in words is "twenty-eight million, eight hundred thirty-six thousand, two hundred eighty-nine".