28259237 has 2 divisors, whose sum is σ = 28259238. Its totient is φ = 28259236.

The previous prime is 28259233. The next prime is 28259243. The reversal of 28259237 is 73295282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20784481 + 7474756 = 4559^2 + 2734^2 .

It is a cyclic number.

It is not a de Polignac number, because 28259237 - 2² = 28259233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28259237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28259233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14129618 + 14129619.

It is an arithmetic number, because the mean of its divisors is an integer number (14129619).

Almost surely, 2^28259237 is an apocalyptic number.

It is an amenable number.

28259237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28259237 is an equidigital number, since it uses as much as digits as its factorization.

28259237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 28259237 is about 5315.9417792147. The cubic root of 28259237 is about 304.5931581700.

The spelling of 28259237 in words is "twenty-eight million, two hundred fifty-nine thousand, two hundred thirty-seven".