27220705 has 16 divisors (see below), whose sum is σ = 33981120. Its totient is φ = 20907712.

The previous prime is 27220703. The next prime is 27220729. The reversal of 27220705 is 50702272.

It is a cyclic number.

It is not a de Polignac number, because 27220705 - 2¹ = 27220703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27220705.

It is not an unprimeable number, because it can be changed into a prime (27220703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32502 + ... + 33328.

It is an arithmetic number, because the mean of its divisors is an integer number (2123820).

Almost surely, 2^27220705 is an apocalyptic number.

It is an amenable number.

27220705 is a deficient number, since it is larger than the sum of its proper divisors (6760415).

27220705 is a wasteful number, since it uses less digits than its factorization.

27220705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 27220705 is about 5217.3465478153. The cubic root of 27220705 is about 300.8152087020.

Adding to 27220705 its reverse (50702272), we get a palindrome (77922977).

The spelling of 27220705 in words is "twenty-seven million, two hundred twenty thousand, seven hundred five".