27420289 has 4 divisors (see below), whose sum is σ = 29529556. Its totient is φ = 25311024.

The previous prime is 27420229. The next prime is 27420299. The reversal of 27420289 is 98202472.

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 2250000 + 25170289 = 1500^2 + 5017^2 .

It is a cyclic number.

It is not a de Polignac number, because 27420289 - 2¹³ = 27412097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27420229) 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, 1054614 + ... + 1054639.

It is an arithmetic number, because the mean of its divisors is an integer number (7382389).

Almost surely, 2^27420289 is an apocalyptic number.

It is an amenable number.

27420289 is a deficient number, since it is larger than the sum of its proper divisors (2109267).

27420289 is a wasteful number, since it uses less digits than its factorization.

27420289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109266.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 27420289 is about 5236.4385797983. The cubic root of 27420289 is about 301.5486181105.

The spelling of 27420289 in words is "twenty-seven million, four hundred twenty thousand, two hundred eighty-nine".