27956321 has 8 divisors (see below), whose sum is σ = 29012544. Its totient is φ = 26918640.

The previous prime is 27956311. The next prime is 27956329. The reversal of 27956321 is 12365972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27956321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27956329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (3626568).

Almost surely, 2^27956321 is an apocalyptic number.

27956321 is the 3053-rd octagonal number.

It is an amenable number.

27956321 is a deficient number, since it is larger than the sum of its proper divisors (1056223).

27956321 is an equidigital number, since it uses as much as digits as its factorization.

27956321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271.

The product of its digits is 22680, while the sum is 35.

The square root of 27956321 is about 5287.3737337170. The cubic root of 27956321 is about 303.5009159992.

The spelling of 27956321 in words is "twenty-seven million, nine hundred fifty-six thousand, three hundred twenty-one".