27220287 has 4 divisors (see below), whose sum is σ = 36293720. Its totient is φ = 18146856.

The previous prime is 27220283. The next prime is 27220289. The reversal of 27220287 is 78202272.

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

It is not a de Polignac number, because 27220287 - 2² = 27220283 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 (27220283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4536712 + ... + 4536717.

It is an arithmetic number, because the mean of its divisors is an integer number (9073430).

Almost surely, 2^27220287 is an apocalyptic number.

27220287 is a deficient number, since it is larger than the sum of its proper divisors (9073433).

27220287 is an equidigital number, since it uses as much as digits as its factorization.

27220287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9073432.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 27220287 is about 5217.3064889845. The cubic root of 27220287 is about 300.8136689255.

The spelling of 27220287 in words is "twenty-seven million, two hundred twenty thousand, two hundred eighty-seven".