28088237 has 2 divisors, whose sum is σ = 28088238. Its totient is φ = 28088236.

The previous prime is 28088227. The next prime is 28088293. The reversal of 28088237 is 73288082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28079401 + 8836 = 5299^2 + 94^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28088237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28088237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28088227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14044118 + 14044119.

It is an arithmetic number, because the mean of its divisors is an integer number (14044119).

Almost surely, 2^28088237 is an apocalyptic number.

It is an amenable number.

28088237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28088237 is an equidigital number, since it uses as much as digits as its factorization.

28088237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 28088237 is about 5299.8336766355. The cubic root of 28088237 is about 303.9775383046.

The spelling of 28088237 in words is "twenty-eight million, eighty-eight thousand, two hundred thirty-seven".