27424 has 12 divisors (see below), whose sum is σ = 54054. Its totient is φ = 13696.

The previous prime is 27409. The next prime is 27427. The reversal of 27424 is 42472.

It can be written as a sum of positive squares in only one way, i.e., 17424 + 10000 = 132^2 + 100^2 .

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (27427) by changing a digit.

27424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397 + ... + 460.

2²⁷⁴²⁴ is an apocalyptic number.

It is an amenable number.

27424 is a deficient number, since it is larger than the sum of its proper divisors (26630).

27424 is an equidigital number, since it uses as much as digits as its factorization.

27424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 859 counting only the distinct ones).

The product of its digits is 448, while the sum is 19.

The square root of 27424 is about 165.6019323559. The cubic root of 27424 is about 30.1562221133.

Adding to 27424 its product of digits (448), we get a palindrome (27872).

Adding to 27424 its reverse (42472), we get a palindrome (69896).

The spelling of 27424 in words is "twenty-seven thousand, four hundred twenty-four", and thus it is an iban number.