27400027 has 4 divisors (see below), whose sum is σ = 27451216. Its totient is φ = 27348840.

The previous prime is 27400003. The next prime is 27400049. The reversal of 27400027 is 72000472.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27400027 is a prime.

It is a super-2 number, since 2×27400027² = 1501522959201458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27399980 and 27400007.

It is not an unprimeable number, because it can be changed into a prime (27400327) 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, 24783 + ... + 25864.

It is an arithmetic number, because the mean of its divisors is an integer number (6862804).

Almost surely, 2^27400027 is an apocalyptic number.

27400027 is a deficient number, since it is larger than the sum of its proper divisors (51189).

27400027 is an equidigital number, since it uses as much as digits as its factorization.

27400027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51188.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 27400027 is about 5234.5035103628. The cubic root of 27400027 is about 301.4743241732.

Adding to 27400027 its reverse (72000472), we get a palindrome (99400499).

The spelling of 27400027 in words is "twenty-seven million, four hundred thousand, twenty-seven".