26988287 has 2 divisors, whose sum is σ = 26988288. Its totient is φ = 26988286.

The previous prime is 26988277. The next prime is 26988317. The reversal of 26988287 is 78288962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26988287 - 2¹⁶ = 26922751 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26988277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13494143 + 13494144.

It is an arithmetic number, because the mean of its divisors is an integer number (13494144).

Almost surely, 2^26988287 is an apocalyptic number.

26988287 is a deficient number, since it is larger than the sum of its proper divisors (1).

26988287 is an equidigital number, since it uses as much as digits as its factorization.

26988287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 50.

The square root of 26988287 is about 5195.0252164932. The cubic root of 26988287 is about 299.9566122438.

The spelling of 26988287 in words is "twenty-six million, nine hundred eighty-eight thousand, two hundred eighty-seven".