27217090 has 32 divisors (see below), whose sum is σ = 50563440. Its totient is φ = 10543104.

The previous prime is 27217061. The next prime is 27217093. The reversal of 27217090 is 9071272.

It is a happy number.

It is a Cunningham number, because it is equal to 5217²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 19616041 + 7601049 = 4429^2 + 2757^2 .

It is not an unprimeable number, because it can be changed into a prime (27217093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46882 + ... + 47458.

Almost surely, 2^27217090 is an apocalyptic number.

27217090 is a deficient number, since it is larger than the sum of its proper divisors (23346350).

27217090 is a wasteful number, since it uses less digits than its factorization.

27217090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 27217090 is about 5217.0000958405. Note that the first 4 decimals coincide. The cubic root of 27217090 is about 300.8018916930.

The spelling of 27217090 in words is "twenty-seven million, two hundred seventeen thousand, ninety".