27256289 has 4 divisors (see below), whose sum is σ = 27718320. Its totient is φ = 26794260.

The previous prime is 27256249. The next prime is 27256291. The reversal of 27256289 is 98265272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-27256289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27256249) 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, 230927 + ... + 231044.

It is an arithmetic number, because the mean of its divisors is an integer number (6929580).

Almost surely, 2^27256289 is an apocalyptic number.

It is an amenable number.

27256289 is a deficient number, since it is larger than the sum of its proper divisors (462031).

27256289 is an equidigital number, since it uses as much as digits as its factorization.

27256289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462030.

The product of its digits is 120960, while the sum is 41.

The square root of 27256289 is about 5220.7555966546. The cubic root of 27256289 is about 300.9462308712.

It can be divided in two parts, 2 and 7256289, that multiplied together give a triangular number (14512578 = T₅₃₈₇).

The spelling of 27256289 in words is "twenty-seven million, two hundred fifty-six thousand, two hundred eighty-nine".