27728263 has 4 divisors (see below), whose sum is σ = 28684440. Its totient is φ = 26772088.

The previous prime is 27728231. The next prime is 27728287. The reversal of 27728263 is 36282772.

It is a happy number.

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 27728263 - 2⁵ = 27728231 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 (27728203) 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 3 ways as a sum of consecutive naturals, for example, 478045 + ... + 478102.

It is an arithmetic number, because the mean of its divisors is an integer number (7171110).

Almost surely, 2^27728263 is an apocalyptic number.

27728263 is a deficient number, since it is larger than the sum of its proper divisors (956177).

27728263 is an equidigital number, since it uses as much as digits as its factorization.

27728263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956176.

The product of its digits is 56448, while the sum is 37.

The square root of 27728263 is about 5265.7632875016. The cubic root of 27728263 is about 302.6733764666.

The spelling of 27728263 in words is "twenty-seven million, seven hundred twenty-eight thousand, two hundred sixty-three".