27720223 has 4 divisors (see below), whose sum is σ = 28396368. Its totient is φ = 27044080.

The previous prime is 27720211. The next prime is 27720233. The reversal of 27720223 is 32202772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27720223 - 2⁵ = 27720191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27720233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338011 + ... + 338092.

It is an arithmetic number, because the mean of its divisors is an integer number (7099092).

Almost surely, 2^27720223 is an apocalyptic number.

27720223 is a deficient number, since it is larger than the sum of its proper divisors (676145).

27720223 is an equidigital number, since it uses as much as digits as its factorization.

27720223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676144.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 27720223 is about 5264.9998100665. Note that the first 3 decimals coincide. The cubic root of 27720223 is about 302.6441195650.

Adding to 27720223 its reverse (32202772), we get a palindrome (59922995).

The spelling of 27720223 in words is "twenty-seven million, seven hundred twenty thousand, two hundred twenty-three".