27726481 has 2 divisors, whose sum is σ = 27726482. Its totient is φ = 27726480.

The previous prime is 27726451. The next prime is 27726499. The reversal of 27726481 is 18462772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 5683456 = 4695^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 27726481 - 2⁵ = 27726449 is a prime.

It is a super-2 number, since 2×27726481² = 1537515497286722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27726481.

It is not a weakly prime, because it can be changed into another prime (27726421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863240 + 13863241.

It is an arithmetic number, because the mean of its divisors is an integer number (13863241).

Almost surely, 2^27726481 is an apocalyptic number.

It is an amenable number.

27726481 is a deficient number, since it is larger than the sum of its proper divisors (1).

27726481 is an equidigital number, since it uses as much as digits as its factorization.

27726481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 37.

The square root of 27726481 is about 5265.5940785442. The cubic root of 27726481 is about 302.6668924024. Note that the first 3 decimals are identical.

The spelling of 27726481 in words is "twenty-seven million, seven hundred twenty-six thousand, four hundred eighty-one".