27720201 has 12 divisors (see below), whose sum is σ = 38282192. Its totient is φ = 17841264.

The previous prime is 27720193. The next prime is 27720211. The reversal of 27720201 is 10202772.

It is not a de Polignac number, because 27720201 - 2³ = 27720193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27720211) 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 11 ways as a sum of consecutive naturals, for example, 2971 + ... + 8016.

Almost surely, 2^27720201 is an apocalyptic number.

It is an amenable number.

27720201 is a deficient number, since it is larger than the sum of its proper divisors (10561991).

27720201 is a wasteful number, since it uses less digits than its factorization.

27720201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048 (or 11019 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 27720201 is about 5264.9977207972. The cubic root of 27720201 is about 302.6440395010.

Adding to 27720201 its reverse (10202772), we get a palindrome (37922973).

The spelling of 27720201 in words is "twenty-seven million, seven hundred twenty thousand, two hundred one".