27897449 has 4 divisors (see below), whose sum is σ = 28859460. Its totient is φ = 26935440.

The previous prime is 27897433. The next prime is 27897469. The reversal of 27897449 is 94479872.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13213225 + 14684224 = 3635^2 + 3832^2 .

It is a cyclic number.

It is not a de Polignac number, because 27897449 - 2⁴ = 27897433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27897397 and 27897406.

It is not an unprimeable number, because it can be changed into a prime (27897469) 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, 480962 + ... + 481019.

It is an arithmetic number, because the mean of its divisors is an integer number (7214865).

Almost surely, 2^27897449 is an apocalyptic number.

27897449 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27897449 is a deficient number, since it is larger than the sum of its proper divisors (962011).

27897449 is an equidigital number, since it uses as much as digits as its factorization.

27897449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962010.

The product of its digits is 1016064, while the sum is 50.

The square root of 27897449 is about 5281.8035745378. The cubic root of 27897449 is about 303.2877231534.

The spelling of 27897449 in words is "twenty-seven million, eight hundred ninety-seven thousand, four hundred forty-nine".