27400289 has 4 divisors (see below), whose sum is σ = 31314624. Its totient is φ = 23485956.

The previous prime is 27400279. The next prime is 27400301. The reversal of 27400289 is 98200472.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27400289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27400279) 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, 1957157 + ... + 1957170.

It is an arithmetic number, because the mean of its divisors is an integer number (7828656).

Almost surely, 2^27400289 is an apocalyptic number.

It is an amenable number.

27400289 is a deficient number, since it is larger than the sum of its proper divisors (3914335).

27400289 is an equidigital number, since it uses as much as digits as its factorization.

27400289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914334.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 27400289 is about 5234.5285365542. The cubic root of 27400289 is about 301.4752850728.

The spelling of 27400289 in words is "twenty-seven million, four hundred thousand, two hundred eighty-nine".